Rules for Firing Cannon
The Manufacture of “Greenbacks”
The Metal Magnesium
Economy of Fuel
The Steam Car on the Second Avenue Railroad
Mines in Warfare
The Currency Question
Concerning Boiler Explosions
The New Law for Measuring Ships
The Hecker and Waterman Experiments
Recent American Patents
Patents Granted for Seventeen Years!
Issued From the United States Patent-Office for the Week Ending August 9, 1864.
Notes and Queries