Volume 7, Issue 161supp
You are currently logged out. Please sign in to download the issue PDF.
Features
Electro-Dynamic Illustration
Electrical Clock Dials
Curious Sensations of Heat
The Telephone on a Volcano
Its Use in Detecting Subterranean Sounds
Newhaven Harbor, England
Institution of Civil Engineers, London
Eight Horse Power Traction Engine
Welding of Powders by Pressure
Huch's Densimeter
A Belgian Rag House
Improved Zinc Bath for Galvanizing Iron
Progress of Photography in Russia
Variability of the Sun's Surface
Improved Wool Drying Machinery
Chemical Notes
An Improved Saponifier
Experimental Physiology
Demonstrator of Experimental physiology in the University of Pennsylvania