Scientific American Magazine
Volume 62, Issue 18You are currently logged out. Please sign in to download the issue PDF.
Features
The Westinghouse Interlocking Switch and Signal System
A Questionable Patent Bill
The Oil Well at Southbury, Conn
An Improved Automatic Dumb Waiter
An Improved Water Tower and Extension Ladder
An Improved Brace for Piano String Frames
New German Armor-Clad Cruisers
An Improved Time Register
An Improved Windlass
An Improved Shaft Lighter
An Improved Animal Bed
Preserve for Binding
An Improved Hay Sling
The Wilzin Automatic Knife
The Proposed Suspension Bridge across the Hudson River at New York
An Improved Steam Engine Valve
An Improved Grinding Machine
Automatic Time and Dating Stamps
To Inventors- May 3, 1890
Scientific American Building Edition- May 3, 1890
The Scientific American Established 1846
Departments
Index of Inventions- May 3, 1890
Recently Patented Inventions- May 3, 1890
Business and Personal- May 3, 1890
Notes and Queries- May 3, 1890
New Books and Publications- May 3, 1890
