Volume 94, Issue 21
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Features
Efficiency of the American Locomotive
Conditions of the Rapid Transit Tunnel
A Russian Gasoline-Electric Train
A New and Cheap Process for Generating Hydrogen
The Manufacture of Turpentine
The Art of Piano Making--II
An Automobile School
The Lorimer Automatic Telephone
Pennsylvania Railroad's Terminal Station, New York City
The Laocon Group as it Ought to be
The New Vickers-Maxim 12-Inch Breech-Loading Wire-Wound Gun
By the English correspondent of the scientific American