Volume 109, Issue 3
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Features
Purifying Water by the Action of Ultra-violet Light
A Floating Pneumatic Elevating and Grain Discharging Plant
Shooting at Moving Pictures
Wireless and Sound Signals as Aids to Navigation, The Competition for the New York, New Haven and Hartford Railroad Company's Automatic Stop and more
A Machine for Blowing Window Glass
The Remarkable Sievert Process
Do Animals See Things as We Do?, The Longest Aeroplane Flight and more
An Automatic Electric Light Plant
Price Maintenance and Modern Merchandising--III
Price Protection Distinguished from Trust Control