Features
The Site for the International Exposition of 1892
Position of the Planets for September
An Improved Machine for Bending and Coiling Pipe
Spider Web to Cocoon Making
A System of Protection from Lightning
Astigmatic Eyepiece for Optical Instruments
An Improved Siphon
An Apparatus for Recording Respirations
An Improved Method of Propelling Sleds
An Improved Reversible Safety Stirrup
The Maccoy Pneumatic Tool
A Powerful Battery
Thomas Corwin Mendenhall
The Paris Exhibition
Departments
- Letters
Correspondence- August 31, 1889
- Departments
Business and Personal- August 31, 1889
Recently Patented Inventions- August 31, 1889
Notes and Queries- August 31, 1889
Index of Inventions- August 31, 1889
To Inventors- August 31, 1889
