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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001037854-05-000013.txt : 20050901
<SEC-HEADER>0001037854-05-000013.hdr.sgml : 20050901
<ACCEPTANCE-DATETIME>20050901193915
ACCESSION NUMBER:		0001037854-05-000013
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20050830
FILED AS OF DATE:		20050901
DATE AS OF CHANGE:		20050901

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NL INDUSTRIES INC
		CENTRAL INDEX KEY:			0000072162
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				135267260
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697
		BUSINESS PHONE:		972-233-1700

	MAIL ADDRESS:	
		STREET 1:		5430 LBJ FREEWAY
		STREET 2:		SUITE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL LEAD CO
		DATE OF NAME CHANGE:	19710520

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SIMMONS HAROLD C
		CENTRAL INDEX KEY:			0001037854
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-00640
		FILM NUMBER:		051065891

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		9722331700

	MAIL ADDRESS:	
		STREET 1:		THREE LINCOLN CENTRE
		STREET 2:		5430 LBJ FREEWAY STE 1700
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75240-2697
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>hcs50830nl_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-08-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000072162</issuerCik>
        <issuerName>NL INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>NL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001037854</rptOwnerCik>
            <rptOwnerName>SIMMONS HAROLD C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5430 LBJ FREEWAY</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1700</rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman of the Board &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1900</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>69800</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
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                <transactionCode>P</transactionCode>
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            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.78</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>71800</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
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        <nonDerivativeTransaction>
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                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-30</value>
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            <transactionCoding>
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                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2800</value>
                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            <ownershipNature>
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        <nonDerivativeTransaction>
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            </securityTitle>
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                </transactionShares>
                <transactionPricePerShare>
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        <nonDerivativeTransaction>
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                <transactionFormType>4</transactionFormType>
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                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>800</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.82</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                    <value>D</value>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
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            <transactionDate>
                <value>2005-08-30</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.83</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
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            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>94500</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
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        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-30</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.84</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>95100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
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                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-30</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>17900</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>113000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
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            <transactionAmounts>
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                </transactionShares>
                <transactionPricePerShare>
                    <value>13.9</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
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        <nonDerivativeTransaction>
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            <transactionAmounts>
                <transactionShares>
                    <value>100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.07</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>132800</value>
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                </directOrIndirectOwnership>
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        <nonDerivativeTransaction>
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                <value>Common stock $0.125 par value</value>
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                <transactionFormType>4</transactionFormType>
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            <transactionAmounts>
                <transactionShares>
                    <value>600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.08</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>133400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
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            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.12</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>134400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.17</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>146600</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.18</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>147300</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.2</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>147900</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.22</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>151600</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1800</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.23</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>153400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.24</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>161100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2005-08-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>16700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>177800</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>40350931</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by Valhi</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>222100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by TFMC</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock $0.125 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>119475</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by Spouse</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Directly held by Valhi, Inc. See the Additional Information filed as an exhibit to this statement for a description of the
relationships among the persons joining in this filing.</footnote>
        <footnote id="F2">Directly held by TIMET Finance Management Company. See the Additional Information filed as an exhibit to this statement for
a description of the relationships among the persons joining in this filing.</footnote>
        <footnote id="F3">Directly held by the Reporting Person's spouse. The Reporting Person disclaims beneficial ownership of these shares. See the
Additional Purchase Information filed as Exhibit 99.2 for additional information regarding trades in the issuer's common
stock by the reporting person's spouse on August 30, 2005</footnote>
    </footnotes>

    <remarks>Exhibit Index
99.1 Additional Ownership Information
99.2 Additional Purchase Information</remarks>

    <ownerSignature>
        <signatureName>A. Andrew R. Louis, Attorney-in-fact, for Harold C. Simmons</signatureName>
        <signatureDate>2005-09-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>acspurchases50830.txt
<DESCRIPTION>EXHIBIT 99.2 ADDITIONAL OWNERSHIP INFORMATION
<TEXT>
Exhibit 99.2
Additional Purchase Information


     The reporting person's spouse executed the following trades in the issuer's
common stock.


<TABLE>
<CAPTION>

                                               Amount of         Ownership
                                            Securities Owned       Form
                   Securities Acquired     Following Reported   Direct (eD)or
  Transaction         or Disposed of         Transaction(s)     Indirect (I)
Date       Code  Amount   A or D   Price    (Instr. 3 and 4)     (Instr. 4)
- ---------  ----  ------   ------ --------   ----------------    ------------
<S>         <C>  <C>       <C>   <C>           <C>                   <C>

08/30/2005   J   1,000     A     $13.7800      110,575               I
08/30/2005   J     100     A     $13.7900      110,675               I
08/30/2005   J   2,900     A     $13.8500      113,575               I
08/30/2005   J   1,400     A     $13.9000      114,975               I
08/30/2005   J     750     A     $13.9100      115,725               I
08/30/2005   J   1,250     A     $13.9500      116,975               I
08/30/2005   J     500     A     $13.9900      117,475               I
08/30/2005   J   2,000     A     $14.0000      119,475               I

</TABLE>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>3
<FILENAME>hcs50830nl.htm
<DESCRIPTION>EXHIBIT 99.1 ADDITIONAL OWNERSHIP INFORMATION
<TEXT>
<HTML>
<HEAD>
<TITLE>
Additional Information
</TITLE>
</HEAD>
<BODY>

<P>Exhibit 99.1</P>
<P>Additional Ownership Information</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Valhi,              Inc.
     (&#147;Valhi&#148;),     and    TIMET    Finance     Management     Company
(&#147;TFMC&#148;),  Harold C.  Simmons and Harold C.  Simmons'  spouse  are the
direct holders of approximately 83.1%, 0.5%, 0.4% and 0.2%, respectively, of the
outstanding  common stock of the issuer, NL Industries,  Inc.  (&#147;NL&#148;).
Titanium  Metals  Corporation  (&#147;TIMET&#148;)  is the sole  stockholder  of
TFMC.</P>

     <P>Tremont  LLC  (&#147;Tremont&#148;),  Harold  C.  Simmons'  spouse,  The
     Combined Master Retirement Trust (the  &#147;CMRT&#148;),  Valhi and Harold
C. Simmons are the direct holders of approximately 39.4%, 14.6%, 12.0%, 4.5% and
1.4% of the  outstanding  shares of TIMET  common  stock.  The  ownership of Ms.
Simmons  is  based  on the  1,600,000  shares  of the  TIMET's  6 3/4%  Series A
Convertible  Preferred  Stock,  par value $0.01 per share (the  &#147;Series  A.
Preferred  Stock &#148;),  that she directly owns,  which are  convertible  into
2,666,666  shares of the TIMET's  common stock.  The ownership of Valhi includes
24,500  shares of the TIMET's  common  stock that Valhi has the right to acquire
upon conversion of 14,700 shares of Series A Preferred Stock that Valhi directly
holds. The percentage  ownership of the TIMET's common stock held by Ms. Simmons
and Valhi  assumes the full  conversion of only the shares of Series A Preferred
Stock owned by her or Valhi, respectively.</P>

     <P>Valhi   is  the   sole   member   of   Tremont.   Valhi   Holding Company
     (&#147;VHC&#148;),    the   Harold    Simmons    Foundation,    Inc.   (the
&#147;Foundation&#148;),  the  Contran  Deferred  Compensation  Trust No. 2 (the
&#147;CDCT No. 2&#148;) and the CMRT are the direct holders of 91.0%, 0.9%, 0.4%
and  0.1%,  respectively,  of the  common  stock of  Valhi.  Valhi  Group,  Inc.
(&#147;VGI&#148;),  National City Lines, Inc. (&#147;National&#148;) and Contran
Corporation  (&#147;Contran&#148;)  are the direct  holders of 87.4%,  10.3% and
2.3%, respectively,  of the outstanding common stock of VHC. National, NOA, Inc.
(&#147;NOA&#148;) and Dixie Holding Company (&#147;Dixie  Holding&#148;) are the
direct holders of approximately  73.3%,  11.4% and 15.3%,  respectively,  of the
outstanding  common  stock of VGI.  Contran  and NOA are the  direct  holders of
approximately 85.7% and 14.3%, respectively,  of the outstanding common stock of
National.    Contran   and    Southwest    Louisiana    Land    Company,    Inc.
(&#147;Southwest&#148;) are the direct holders of approximately 49.9% and 50.1%,
respectively,  of the outstanding  common stock of NOA. Dixie Rice  Agricultural
Corporation,  Inc. (&#147;Dixie  Rice&#148;) is the direct holder of 100% of the
outstanding common stock of Dixie Holding.  Contran is the holder of 100% of the
outstanding  common  stock  of  Dixie  Rice.  Contran  is  also  the  holder  of
approximately 88.9% of the outstanding common stock of Southwest.
</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Substantially   all   of
Contran&#146;s  outstanding  voting stock is held by trusts  established for the
benefit  of  certain  children  and  grandchildren  of  Harold C.  Simmons  (the
&#147;Trusts&#148;), of which Mr. Simmons is the sole trustee, or is held by Mr.
Simmons or persons or entities  related to Mr.  Simmons.  As sole trustee of the
Trusts,  Mr.  Simmons  has the power to vote and direct the  disposition  of the
shares of Contran  stock held by the Trusts.  Mr.  Simmons,  however,  disclaims
beneficial ownership of any shares of Contran stock that the Trusts hold.
</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Harold C. Simmons is the
chairman of the board and chief executive officer of the issuer and the chairman
of the board of each of Tremont,  Valhi, VHC, VGI, National, NOA, Dixie Holding,
Dixie Rice, Southwest and Contran.</P>

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Foundation directly holds
     approximately 0.9% of the outstanding Valhi common stock. The Foundation is
a tax-exempt foundation organized for charitable purposes.  Harold C. Simmons is
the chairman of the board and chief executive  officer of the Foundation and may
be deemed to control the Foundation.</P>

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The CDCT No. 2 directly holds
     approximately  0.4%  of the  outstanding  Valhi  common  stock.  U.S.  Bank
National  Association  serves  as  the  trustee  of  the  CDCT  No.  2.  Contran
established the CDCT  No.&#160;2 as an irrevocable  &#147;rabbi  trust&#148;  to
assist Contran in meeting certain deferred compensation obligations that it owed
to Harold C. Simmons.  If the CDCT No. 2 assets are insufficient to satisfy such
obligations,  Contran is obligated to satisfy the balance of such obligations as
they come due. Pursuant to the terms of the CDCT No.&#160;2, Contran (i) retains
the power to vote the shares of Valhi common stock held directly by the CDCT No.
2; (ii) retains  dispositive  power over such shares and (iii) may be deemed the
indirect beneficial owner of such shares.</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The  CMRT directly holds
approximately  12.0% of the outstanding shares of TIMET common stock and 0.1% of
the  outstanding  shares of Valhi common stock.  Valhi  established  the CMRT to
permit the  collective  investment  by master trusts that maintain the assets of
certain  employee  benefit plans Valhi and related  companies  adopt.  Harold C.
Simmons  is the sole  trustee  of the CMRT and a member of the trust  investment
committee for the CMRT.  Valhi&#146;s board of directors selects the trustee and
members  of the trust  investment  committee  for the  CMRT.  Mr.  Simmons  is a
participant in one or more of the employee benefit plans that invest through the
CMRT. He disclaims  beneficial  ownership of any shares held by the CMRT, except
to the extent of his  individual  vested  beneficial  interest,  if any,  in the
assets held by the CMRT.</P>

<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;By virtue of the holding of
     the  offices,  the stock  ownership  and his  service  as  trustee,  all as
described above, (a) Mr. Simmons may be deemed to control the entities described
above and (b) Mr.  Simmons and certain of such entities may be deemed to possess
indirect  beneficial  ownership of shares of NL common stock that Valhi and TFMC
hold directly. However, Mr. Simmons disclaims beneficial ownership of the shares
of NL common stock beneficially  owned,  directly or indirectly,  by any of such
entities.</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NL  and a subsidiary  of
NL directly own 3,522,967 shares and 1,186,200  shares,  respectively,  of Valhi
common stock.  Pursuant to Delaware law, Valhi treats the shares of Valhi common
stock that NL and the subsidiary of NL own directly as treasury stock for voting
purposes and for the purposes of this statement are not deemed outstanding.</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Harold    C.    Simmons'
spouse is the direct owner of 1,600,000  shares of the Series A Preferred stock,
119,475  shares of NL common stock and 43,400 shares of Valhi common stock.  Mr.
Simmons may be deemed to share indirect beneficial ownership of such securities.
Mr. Simmons  disclaims  beneficial  ownership of all securities  that his spouse
holds directly.</P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mr. Harold C. Simmons is
the  direct  owner of 181,800 shares of the  issuer's  common  stock  (including
options exerciseable for 4,000 shares), 221,200 shares of TIMET common stock and
3,383 shares of Valhi common stock. </P>

     <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A  trust of which Harold
C.  Simmons  and  his  spouse  are  co-trustees  and the  beneficiaries  are the
grandchildren  of his  spouse is the  direct  holder  of 40,000  shares of Valhi
common stock.  Mr. Simmons,  as co-trustee of this trust,  has the power to vote
and direct the  disposition of the shares of Valhi common stock the trust holds.
Mr. Simmons disclaims  beneficial  ownership of any shares of Valhi common stock
that this trust holds.</P>
</BODY>
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