EBOOK SCIENTIFIC AMERICAN ***
Produced by Victoria Woosley, Don Kretz, Juliet Sutherland, Charles
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[Illustration]
SCIENTIFIC AMERICAN SUPPLEMENT NO. 787
NEW YORK, January 31, 1891
Scientific American Supplement. Vol. XXXI., No. 787.
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. BIOGRAPHY.--CHARLES GOODYEAR.--The life and discoveries of
the inventor of vulcanized India rubber, with portrait.--1
illustration
II. BIOLOGY.--Can we Separate Animals from Plants?--By ANDREW
WILSON.--A debated point well discussed.--The bases on which
distinctions must be drawn
III. ELECTRICITY.--A New Electric Ballistic Target.--A target
for investigations of the velocity of projectiles, now in use at
the United States Military Academy, West Point, N.Y.--1
illustration.
Electric Erygmascope.--An electric lighting apparatus for
examining earth strata in bore holes for geologists' and
prospectors' use.
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