Various / 2008-09-23 00:00:00

EBOOK SCIENTIFIC AMERICAN SUP. NO. 447 ***


Produced by Don Kretz, Juliet Sutherland, and Distributed Proofreaders


[Illustration]


SCIENTIFIC AMERICAN SUPPLEMENT NO. 447


NEW YORK, JULY 26, 1884
Scientific American Supplement. Vol. XVIII, No. 447.
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. CHEMISTRY.--The Bitter Substance of Hops.--By Dr. H. BUNGENER.
--What gives hops their bitter taste?--Processes for obtaining
hop-bitter acid.--Analysis of the same.
II. ENGINEERING AND MECHANICS.--Improvements in the Harbor
of Antwerp.--With engraving of caisson for deepening the
river.
Progress of Antwerp.--Recent works in the harbor.
Bicycles and Tricycles.--By C.V. BOYS.---Advantages of the
different machines.--Manner of finding the steepness of a hill
and representing same on a map.--Experiments on ball bearings.--
The Otto bicycle.
The Canal Iron Works, London.
Marinoni's Rotary Printing Press.--With 2 engravings.
Chenot's Economic Filter Press.--With engraving.
Steel Chains without Welding.--Method and machines for making
same.
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