Features
The War
Spectral Analysis
Valuable Experiments in Gunnery
Interesting from Fort Pickens and Pensacola
Cochran's Improved Projectile
Raising Money for the War
The New Gunboats
Iron-Clad Frigates Again
Railway Accidents
Steam Wagons for Military Purposes
Iron Ships Not Invulnerable
America at the World's Fair in 1861
Making Steel Rifled Cannon
Soldier-Health
Patent Claims - July 13, 1861
Recent American Inventions
Instructions about European Patents
To Our Readers
Shields for Resisting Shot in Ships
Departments
- Departments
Notes and Queries - July 13, 1861
