Features
Richard L. Maddox, M.D.
Practical Application of Scientific Education in Germany
The Development of the Sault Ste. Marie Canal
Making Fifty-Ton Anchor Chains
Silkworm Culture in America
Reflex Action of Plants as Compared with the Instincts of Insects
Mixing Pump
The Ruins of St. Pierre
Extraordinary Trench Digging
A 20-Ton Traveling Electric Crane
The Elliott Book-Typewriter
A New Form of Trunk
Business and Personal Wants
Departments
- Departments
Correspondence - June 21, 1902
Index of Inventions - June 21, 1902
Recently Patented Inventions - June 21, 1902
New Books - June 21, 1902
Notes and Queries - June 21, 1902
