Scientific American Magazine
Volume 21, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Portable Steam Brick Machine, Work for Women
Terrestrial Magnetism
The Manufacture of Sulphuric Acid
Aerial Navigation
Winkelhouse's Improved Bit Holder
Ault's Improved Candle Holder and Grease Cup
On the Nature of the Aurora Borealis
Stevens' Patent Hand Vise
Massey's Patent Low Water Detector and Gage Cock Combined, and High and Low Water Detector
Report of the Regents of the Smithsonian Institute
Solar Spots
The Protection of Property
The Rational Construction of Hospitals
The Extension of Patents
The Crack of Doom
The Nottingham Knitting Machine, and Gadd & Moore's Improved One Shaft Loom
On Experiments with Dynamite
Report of the Cooper Union for the Advancement of Science and Art
Manufacturing, Mining, and Railroad Items
Obituary.—George Peabody
The Highest Prize Awarded at the American Institute
Wood-Paper Manufacturing Case
H. S. Patent Office
Recent American and Foreign Patents
New Publications
Official List of Patents
Answers to Correspondents
Applications for Extension of Patents
Departments
Correspondence
Business and Personal
