ive subscribers ies, Chemical Works, etc. Send for illus. catalogue to at $3.20 each; additional copies at same proportionate NATHAN & DREYFUS, E LE S c 0 P E Microscopes. Opera Glasses, ! - - ar | ectacles, jarometers,: er~ Sole Manufacturers, NEW YORK. | mometers and Compasses, Tew TD. BE K, Man-… … watchmen. Send for cir- $4, gold, for SCIENTIFIC AMERICAN, 1 year; $9, gold, for - CO. : ; HOUGHTON Cc culars to E. IMHAUSER, PURE ASBESTOS MILL BOARD, gs. New York. . P.O. Box 2875. _15 Hudson and 130 Reade St 212 Broadway, New York. both SCIENTIFIC AMERICAN and SUPPLEMENT for 1 year. Thisineludes…
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