Features
The Wire Gauge
The Fracture of the Duilio's 100-Ton Gun
A Remarkable Oil Company
Some Electrical Measurements of One of Mr. Edison's Horseshoe Lamps
Amending the Patent Law
The Great Gas Well of Pennsylvania
A New Warehouse Truck
Improved Felly Plate
A New Ventilator
New Hose Carriage
New Ticket or Canceling Punch
New Box Machine
New Egg Carrier and Crate
Mechanical Inventions - May 1, 1880
"American Industries-No. 41" - (American Industries.--No.41)
New Wall Tent and Stove
A Novel Shading Pen
Miscellaneous Inventions - May 1, 1880
Nest-Building Fish, GASTEROSTEIDÆ
The Panda, or Wah
Agricultural Inventions - May 1, 1880
Departments
- Departments
Correspondence - May 1, 1880
Notes and Queries - May 1, 1880
Business and Personal - May 1, 1880
New Books and Publications - May 1, 1880
Index of Inventions - May 1, 1880
Patents - May 1, 1880
