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EBOOK SCIENTIFIC AMERICAN SUPPL. 458 ***


Produced by by Don Kretz, Juliet Sutherland, Charles Franks and the
DP Team


[Illustration]


Scientific American Supplement No. 458


NEW YORK, OCTOBER 11, 1884
Scientific American Supplement. Vol. XVIII, No. 458.
Scientific American established 1845
Scientific American Supplement, $5 a year.
Scientific American and Supplement, $7 a year.

TABLE OF CONTENTS.
I. CHEMISTRY AND METALLURGY.--Chemical Nature of Starch
Grains.
The Amalgamation of Silver Ores.--Description of the Francke
tina, or vat process for amalgamation of silver ores.--By E.P.
RATHBONE.--6 figures.
Interesting Facts about Platinum.--Draw stones used for drawing
wire of precious metals.
II. ENGINEERING, MINING, ETC.--Modern Locomotive Practice.--Paper
read before the Civil and Mechanical Engineers' Society.--By
H. MICHELL WHITLEY--10 figures.
New Screw Steam Collier, Frostburg.--1 figure.
Destruction of the Tardes Viaduct by Wind.--With engraving.
Joy's Reversing and Expansion Valve Gear.--1 figure.
The Steam Bell for Locomotives.
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