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Scientific American Supplement No. 415




NEW YORK, DECEMBER 15, 1883

Scientific American Supplement. Vol. XVI, No. 415.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.




TABLE OF CONTENTS.

I. CHEMISTRY AND METALLURGY.--Carbon in Steel.

Heat developed in Forging.

Recent Studies on the Constitution of Alkaloids.--Extract from