The Sciences
Cause of Vitiation of Confined Air
How Ill Effects are Modified by Constant Ventilation
Stories by Alfred Gradenwitz
The Sciences
A Remarkable Arithmetician
The Sciences
Captive Balloons in the German Army and Navy
The Sciences
An Aeronautical Observatory
The Elaborate Equipment of a Model Institution.
Technology
A Novel Apparatus for Demonstrating Atmospheric Pressure
Technology
Mechanical Masterpieces of the Eighteenth Century
The Sciences
The Operation of Mechanical Devices at a Distance by means of the Wireless Transmission of Energy
Technology
An X-Ray Stereoscope
The Sciences
A New Direct-Reading Wind Gage
Technology
The Talking Siren of Dr. Marage
The Sciences
The use of Compressed Air in Cleaning
The Sciences
A Gigantic Clock
The Sciences
A Wire Rope Railway Used in the Construction of an Italian Fortress
Technology
An Interesting German Flying Machine
The Sciences
Leduc's Artificial Plants and Cells
Technology
Electrically-Driven Target Trains in the German Army
The Sciences
The Southwest African Railway
Technology
The Microphotoscope--An Apparatus for Examining Minute Maps
The Sciences
A Shorthand-Writing Machine
The Sciences
