Scientific American Magazine
Volume 23, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
Improvement in Road Steamers
Scientific Use of the Imagination- November 19, 1870
Professor Tyndall's Lecture on Electrical Phenomena
The Stereoscope
Scientific Intelligence- November 19, 1870
Progress of Invention Abroad- November 19, 1870
Bourne's Spherical Steam Engine Governor
Power's Endless Ladder Hod Elevator
Device for Spreading Circular Saw Teeth
How Long Shall Nitro-Glycerin Continue Its Work of Destruction?--The Fairport Explosion
Roads and Road-Making
The Motive Power of Expanding Gases
Resignation of Commissioner Fisher
Time and Distance
Attempt to Abolish the Patent Office
Letters from the South- November 19, 1870
Answers to Correspondents- November 19, 1870
Queries- November 19, 1870
Razing Band Saws
Recent American and Foreign Patents- November 19, 1870
Official List of Patents- November 19, 1870
Departments
Correspondence- November 19, 1870
Business and Personal- November 19, 1870
New Books and Publications- November 19, 1870
