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SCIENTIFIC AMERICAN SUPPLEMENT NO. 392




NEW YORK, JULY 7, 1883

Scientific American Supplement. Vol. XVI, No. 392.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


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TABLE OF CONTENTS.

I. ELECTRICITY AND MAGNETISM.--Improved Dynamo Machine.
Eight figures.

An Improved Manganese Battery.--By GEO. LEUCHS.