Features
Permeability of Cements, The Hastings Telescope, and more
Experiments in Magnetism
Improved Structure for Use as a Silo
An Improved Wire Stretcher
An Improved Pocket Knife
An Improved Rocking Chair
Improved Protector for Dikes or Levees
An Improved Rope Clamp
An Improved Binder
An Improved Book Support
Photographic Notes- April 20, 1889
Michel Eugene Chevreul
The Rev. J. G. Wood
To Inventors- April 20, 1889
Departments
- Letters
Correspondence- April 20, 1889
- Recommended
New Books and Publications- April 20, 1889
- Departments
Recently Patented Inventions- April 20, 1889
Business and Personal- April 20, 1889
Notes and Queries- April 20, 1889
Index of Inventions- April 20, 1889
