Features
The Reynolds Air-Tight Heater
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
The United States Assay Office in New York
Recent American and Foreign Patents
Barometers as Indicators of the Weather
Extension Notices
Answers to Correspondents
New Publications
Turner's Rotary Steam Engine
Ornamental Petroleum Stove
The Oscillating or Variable Eccentric Motion
To Advertising Correspondents --Axes to Grind
Grindstones--their Actual and Possible Uses
The Cooper Union in New York
Uniformity
Why a Long Screwdriver Impels a Screw More Easily Than a Short One
Editorial Summary
New Engraving Lathe
Construction of Fire-Proof Buildings
Magnified Photographic Pictures
Official Report of Patents and Claims
Departments
- Departments
Business and Personal
