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Combined Sawing, Boring, Molding and Planing Machine

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


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September 20, 1862

Of Shamrocks and Science

Happy St. Patrick’s Day