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SA Supplements Vol 31 Issue 803supp

SA Supplements

Volume 31, Issue 803supp

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Features

The Great Equatorial of the Paris Observatory

Lily of the Valley

Report on Insects

The Onion Maggot

The Breeds of Dogs

Restocking the Seine with Fish

Modern Armor

F. R. Brainard

The New Compressed Air Station at Paris

The Builders of the Steam Engine— The Founders of Modern industries and Nations

R. H. Thurston

Improved Hand Car

The Conic Sections

C. W. MacCord

The Tanning materials of Europe

Table of Atomic Weight

Testing Cement

An Apparatus for Heating Substances in Glass Tubes under Pressure

H. Pemberton

Departments

Patents- May 23, 1891