Volume 57, Issue 21
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Features
The Geneva Non-Magnetic Watch
Photographic Notes - November 19, 1887
Improved Construction of Grain Elevators
An Improved Violin Tuning Peg
An Improved Vermin Exterminator
An Improved Ore Jigger
An Improved Shoemaker's Pegging Jack
Compressed Air Locomotive for Underground Haulage
An Improved Railroad Signal
Our New Navy
Otto Von Guericke's Vacuum Gun
The New Jersey Ballot Box
New Isochronal Clock
Pneumatic Speed Indicator
The Volcano of Kluchi or Kluchefskaya, Kamschatka
Agricultural Inventions - November 19, 1887
Engineering Inventions - November 19, 1887
Special - November 19, 1887
The Heroism of Women