EBOOK SCIENTIFIC AMERICAN ***
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[Illustration]
SCIENTIFIC AMERICAN SUPPLEMENT NO. 803
NEW YORK, May 23, 1891
Scientific American Supplement. Vol. XXXI., No. 803.
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. ASTRONOMY.--The Great Equatorial of the Paris Observatory.--
The new telescope recently put in use in Paris.--Description of
the instrument and of its effects.--3 illustrations
II. CHEMISTRY.--An Apparatus for Heating Substances in Glass
Tubes under Pressure.--By H. PEMBERTON, Jr.--A simple apparatus
for effecting this purpose, avoiding risk of personal injury.--
2 illustrations
Table of Atomic Weights.--A revised table of atomic weights,
giving the results of the last determinations, and designed for
every-day use
Testing Cement.--A laboratory process for testing Portland cement
III. CIVIL ENGINEERING.--The Compressed Air System of Paris.
--An elaborate review of this great installation for the transmission
of power.--The new compressed air station, with full details
of performances of apparatus, etc.
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