Volume 91, Issue 21
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Features
Work on the Simplon Tunnel
The Ventilation of the Subway
The Mining Debris Problem in California
The Automobile and its Utility in the Industrial Development of Latin America
An Improved Cattle Guard
Revolving Scrubbing Machine
A Carboy Inclinator
The Miethe Color Projector
By Our Berlin Correspondent
Recent Automobile and Motor-Boat Speed Records
The German National Pavilion at St. Louis
The Cultivation of Tea in Ceylon
The Water Organ--A Roman Keyboard Instrument
A Curious Piece of Casting
Tomato Vines Thirty Feet Long
Business and Personal Wants
READ THIS COLUMN CAREFULLY--You will find inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will send you the name and address of the party desiring the information. In every case it is necessary to give the number of the inquiry. MUNN&CO.