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The Ohio Pump

Scientific Memoranda

Galvanic Slug and Snail Shocker

Our Industrial Establishments

Physical Education

The Culture of Tobacco

Maple Sugar

Tapping Holes

The Boiling of Water and Steam-Boiler Explosions

Iron-Clad Ships Against Forts and Heavy Ordnance

Geology and the “King Crab”

Causes of the Phenomena in Organic Nature--The Origin of Species

Valuable Receipts

Patent Claims

Issued from the United States Patent Office

Recent American Patents

To Our Readers

Secondary Government Fees on Patents

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May 02, 1863

Beyond XX and XY

Biology. Identity. Equality.