Volume 44, Issue 1133supp
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Features
The Solenoid Electromagnet
An Improved System of Overhead Connection for Electric Traction
The Origin of the Telephone
New Dry Dock at Hamburg
Armor Plate Press
Wind as an Aid to Flight
Perpetual Motion.—III
Hydraulic Flanging Press
Improvident Civilization
A Plea for the Application of Scientific Methods to the Amelioration of Socio-Economic Defects and Disorders