Features
Modern Suction Dredging
Pumping No Longer Restricted to Liquids
Velocity and Range of Guns
From the Black-Powder Muzzle-Loader to the Smokeless-Powder Rifle
Part 1 of 2
Testing Eggs by Photography
Some of the Things Which the Eyes of the Camera Sees When it Looks Through the Hen's Creations
Departments
- Letters
Correspondence- April 20, 1918
- Departments
The Service of the Chemist- April 20, 1918
The Motor-Driven Commercial Vehicle--April 20, 1918
Recently Patented Inventions- April 20, 1918
