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SCIENTIFIC AMERICAN SUPPLEMENT NO. 508




NEW YORK, SEPTEMBER 26, 1885

Scientific American Supplement. Vol. XX., No. 508.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.

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TABLE OF CONTENTS

PAGE
I. CHEMISTRY AND METALLURGY.--The Cowles Electric Smelting
Process. 5 figures. 8113