Volume 9, Issue 15
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Features
Miscellaneous Summary
A Novel Mode of Telegraphing by Solar Light
The American Watch as a Time-Keeper
Horace H. Day's India-Rubber Breech-Piece
Examination of Torpedo Sent from the Navy Department
Practice at Target Made of Hogs-Hair
Birney's Incendiary Shell
English and American Iron-Clad Ships of War
A Trap to Catch a Sunbeam
American Guns
The Pitches of Screw Threads
Recent American Patents
Engines of the “Puritan” and “Dictator”
Coating Iron, White Copper, and Brass
Patent Claims
Issued from the United States Patent Office