Scientific American Magazine
Volume 22, Issue 12You are currently logged out. Please sign in to download the issue PDF.
Features
The Pedespeed, Improved Fan Blower
Visit to a Steel Manufactory
An Interesting Review of the American Patent System
Products of the Pine Forest
Woods' Saw-Gumming and Sharpening Machine
Snyder's Improved Turbine Wheel
The Use of Salt in Agriculture
Proposed Sale of the Yosemite Valley
Co-Operation among Inventors
Something about Gases
Congress Extending Patents
Proposed Plan for Publishing Patent Office Specifications and Drawings
New Mechanical Movements
Recent American and Foreign Patents- March 19, 1870
Applications for Extension of Patents- March 19, 1870
Progress of American Invention in Europe- March 19, 1870
Official List of Patents- March 19, 1870
Rotating and Fixed Turrets
Departments
Correspondence- March 19, 1870
Business and Personal- March 19, 1870
Answers to Correspondents- March 19, 1870
New Books and Publications- March 19, 1870
