Features
Report on Testing Iron Armor Plates
Miscellaneous Summary
Notes on Naval and Military Affairs
The Color Products of Coal--Mauve and Magenta
Valuable Receipts
Proportions of Locomotives
Meucci's Kerosene Lamp
Paines's Spray Superheated Steam Engine
Salts of Silver, Photography and Indelible Ink
Petroleum is not Coal Oil
A Great Law of Nature
The London Exhibition--Wrought Iron
The Frigate Ironsides
The North is Invaded
Patent Claims
Recent American Inventions
To Our Readers
Smiths' Mode of Setting Tombstones
Blythe's Ventilating Cap
Departments
- Departments
Correspondence
Notes and Queries
