Scientific American Magazine
Volume 56, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
Colossus, of the British Navy
Electric Accumulators
Headway of Great Ships
Improved Harrow and Pulverizer
Vegetable Grater
Improved Horizontal Stationary Engine
Watch for the Blind
Device for Operating Awnings
Clearing Attachment for Grain Drills
Folding and Pasting Machines
Improved Lamp Post
Violin Tuning Peg
A Perpetual Motion Machine--Will it Work?
Steno-Telegraphy
The Porcupine in the Berlin Zoological Garden
The Mechanical Working of Ballast Quarries
A Simple Galvanometer
Experiment in Magnetism
Miscellaneous Inventions - May 14, 1887
Engineering Inventions - May 14, 1887
Agricultural Inventions - May 14, 1887
To Inventors - May 14, 1887
Departments
Correspondence - May 14, 1887
Business and Personal - May 14, 1887
New Books and Publications - May 14, 1887
Notes and Queries - May 14, 1887
Index of inventions - May 14, 1887
