0000905148-00-000131 15-12B 1 20000119 ASARCO INC 0000007649 3330 134924440 DE 1231 15-12B 34 001-00164 509375 180 MAIDEN LN NEW YORK NY 10038 2125102000 AMERICAN SMELTING & REFINING CO 19760607 15-12B 1 000090514800000131-001-seq1-15-12b.txt T:\EDGAR\CHANG\654483.SUB