Scientific American Magazine
Volume 67, Issue 25You are currently logged out. Please sign in to download the issue PDF.
Features
Pneumatic Tubes for Mail Service
The Meteors of November, 1892
Dr. Ernst Werner Siemens
An Improved Breast Collar
An Improved Exhaust Nozzle
The Henrion Dynamo
Rod and Ring Experiment
Some of the "Cholera Streets" in Hamburg
The Hygienic Treadmill
Improved Recording Pressure Gauge
Metropolitan Sewerage System Surrounding Boston
Departments
Correspondence- December 17, 1892
Recently Patented Inventions- December 17, 1892
Notes and Queries- December 17, 1892
Index of Inventions- December 17, 1892
To Inventors- December 17, 1892
Business and Personal- December 17, 1892
New Books and Publications- December 17, 1892
