Scientific American Magazine
Volume 27, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
The Prall Automatic Steam Vacuum Pump
The Hands of the Nation
Lightning Rods
New Steam Dredging Boats
Improved Bung
A Bridle Bit that is Something More, and an Improved Stocking for Horses
Armored Can
Saving of Time—A Serious Charge against the Scientific American
Scientific and Practical Information - July 27, 1872
Hose Coupling
Sewing Machine - July 27, 1872
Narrow and Cheap Railways
The Two Oceans
Oxyhydrogen Street Lamps
End of the Eight Hour Strike
Paper Hangings and their Manufacture
Solid Emery Grinder
The Nature of Comets
Recent American and Foreign Patents - July 27, 1872
New Patent Law in Canada - July 27, 1872
Departments
Correspondence - July 27, 1872
Business and Personal - July 27, 1872
Notes and Queries - July 27, 1872
Answers to Correspondents - July 27, 1872
New Books and Publications - July 27, 1872
Index of Inventions - July 27, 1872
