Volume 91, Issue 25
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Features
The Electric Smelting of Iron Ore
Launch of the Armored Cruiser "Tennessee"
Panama Canal Problems
Blondlot and Prof. Wood on the N-Rays
To our Subscribers
"American Estates and Gardens"
The New British Patent Act
Radium and Radio-Activity
The Great London Power Station
Roman Remains in North Africa
By the Paris Correspondent of the Scientific American
The High-Powered Traction Engine and Its Many Uses
Aeroplanes in France and M. Archdeacon'a Apparatus. -- Rules for Concourses
Photography of the Interior of the Eye
The Bioscope--An Instrument for the Study of Insect Life
Irrigation in Southern California
Battleships "Idaho" and "Mississippi"
The Modern Battleship Within and Without
The How and Why of the Modern Keyboard.--I
Business and Personal Wants
READ. THIS COLUMN CAREFULLY--You will lind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we wili send you the name and address of the party desir-ingtheinformation. Iu every case it is necessary to give the number of the inquiry