Scientific American Magazine
Volume 22, Issue 18You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Stall Floor for Horses, To Prevent Decay of Shingles, and more
Light and Vision--More Especially How Light Is Converted Into Thought
Mammalian Fossils--A Facetious Reviewer
The Cocoa Palm
Dugdale's Universal Clothes Washer
Langhorne's Improved Nut-Lock
Gentlemen Glass-Makers
Uses of Fluor Spar
Safety vs. Economy in the Construction of Steam Boilers
Metallic Hydrogen
The Study of Impracticabilities
New Mechanical Movements
Scientific Intelligence- April 30, 1870
The Increased Use of Cold-Rolled Shafting
The Great Union Depot on Fourth Avenue, New York
Morin's Experiments upon the Punching of Metals
Electric Forces
Bill to Amend the Patent Laws Now Pending before Congress
Instrument for Measuring the Deflection of Girders
Answers to Correspondents- April 30, 1870
Editorial Summary- April 30, 1870
Recent American and Foreign Patents- April 30, 1870
Official List of Patents- April 30, 1870
Departments
Correspondence- April 30, 1870
Business and Personal- April 30, 1870
New Books and Publications- April 30, 1870
