Features
A School of Ship Building--The Objects and Ideas of Its Founder
A Regulator for Dynamos and Motors
A Convenient Ear Trumpet
An Improved Copy Holder
Railroad Sleepers Arranged in Pairs
An Improved Pipe or Flue Cutter
An Improved Velocipede
An Improved Metallic Railway Tie
A Device to Block Cars on a Grade
The Hudson River Bridge
A Pug Mill for Brick Makers
A Pipe Cutter, Beader, and Expander
The Manufacture of Salt at Syracuse, N. Y.
The Codonophone
The Sebae or Silk Cotton Tree
The Belt Problem
An Instantaneous Shutter for Hand Cameras
A Nautico-Terrestrial Velocipede
Departments
- Letters
Correspondence- December 13, 1890
- Recommended
New Books and Publications- December 13, 1890
- Departments
Recently Patented Inventions- December 13, 1890
Notes & Queries- December 13, 1890
Business and Personal- December 13, 1890
To Inventors- December 13, 1890
Index of Inventions- December 13, 1890
