Features
It Pays to Advertise in the Scientific American
The Gypsy Moth in Massachusetts
An Improved Screen Attachment for Windows
An Improved Surveyor's Instrument
An Improved Umbrella or Parasol Exhibitor
Bolt Threading Machine
An Improved Folding Table
A Hand Rest for Penmen
An Improved Adjustable Axle Nut
An Improved Blasting Car
An Improved Block and Clevis for Log Wagons
The Chicago
Redwood Logging In California
A Wrinkle in Sawing
The Scientific Use of the Phonograph
Departments
- Letters
Correspondence- July 26, 1890
- Recommended
New Books and Publications- July 26, 1890
- Departments
Recently Patented Inventions- July 26, 1890
Business and Personal- July 26, 1890
Notes and Queries- July 26, 1890
Index of Inventions- July 26, 1890
To Inventors- July 26, 1890
