Scientific American Magazine
Volume 22, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Portable Engine for Agricultural Use
Meteors
McNeil's Improved Tobacco Pipe
Obituary--Zerah Colburn, Engineer, and Leading Writer of Engineering Papers
The American Museum of Natural History
The Dangers of Drugs
Steam Boiler Inspection
Mechanical Recreations - May 14, 1870
Scientific Intelligence- May 14, 1870
Curious Associations among Animals
Chemistry of Zirconium
United States District Court--Southren District before Judge Blatchford Patent for Making Veneers
Applications for Extension of Patents- May 14, 1870
Recent American and Foreign Patents- May 14, 1870
Official List of Patents- May 14, 1870
Answers to Correspondents- May 14, 1870
Departments
Correspondence- May 14, 1870
Business and Personal- May 14, 1870
