Scientific American Magazine
Volume 18, Issue 25You are currently logged out. Please sign in to download the issue PDF.
Features
The Reynolds Air-Tight Heater
Improved Machine for Drilling Stone
Science Familiarly Illustrated
Protection of Buildings Against Fires
How to Test the Purity of Water
Wagner's Improved Dinner Pail
Possibility of Speech by Those Hitherto Considered Mutes
Manufacturing Mining and Railroad Items
Recent American and Foreign Patents
The United States Assay Office in New York
Barometers as Indicators of the Weather
Answers to Correspondents
Extension Notices
New Publications
Turner's Rotary Steam Engine
Ornamental Petroleum Stove
The Oscillating or Variable Eccentric Motion
Why a Long Screwdriver Impels a Screw More Easily Than a Short One
Uniformity
The Cooper Union in New York
Grindstones--their Actual and Possible Uses
To Advertising Correspondents --Axes to Grind
New Engraving Lathe
Construction of Fire-Proof Buildings
Magnified Photographic Pictures
Editorial Summary
Official Report of Patents and Claims
Departments
Business and Personal
