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Drawbridge over the Harlem River

Early Experiments in Steam Navigation

Traction Increasers

Light Draught River Steamer


The Pneumatic Dynamite Torpedo Gun

Military Aeronautics

Gold Mining Machinery

Gun Steel

The Lewis-Bartlett Process of Lead Smelting

By William Ramsay

Parisian Carpet Loom

Balloon Varnishes

Climate in its Relation to Health

By G. V. Poore

The Scallop and its Fishery

By Ernest Ingersoll

A New Storage Battery

Detection of Chloroform

By Charles Ludeking

Theatrical Firearms

Giuseppe Verdi

Building Plans and Specifications


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May 14, 1887

Science for the Modern World