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Features

Sir John Herschel

Instrument for Parting Ladies' Hair

A Self-Moving Ship

Philippi's Improved Drill Chuck

Improved Self-Measuring Faucet

Rand's Improved Saw Arbor

Improvement in Riveting Tools

Odiorne's Improvement in Seals for Hydraulic Mains of Gas Works

Joseph Henry and the Electric Telegraph

Effect of Corporation Employment on Work-Men

Lightning Rods

Extracting Gold from Washings and Poor Ores

The Kelly Patent Extension Case.--Address of Hon. S. S. Fisher.--Competitive Examinations.-- Female Applicants for Clerkships in the Patent Office

Massachusetts Shoemakers on the Taxes

Colossal Bronze Bust of Washington Irving

Scientific Intelligence- July 1, 1871

Queries- July 1, 1871

Narrow Gages for Railways

Answers to Correspondents- July 1, 1871

Applications for Extension of Patents- July 1, 1871

Official List of Patents- July 1, 1871

Recent American and Foreign Patents- July 1, 1871

Departments

  • Letters

    Correspondence- July 1, 1871

  • Recommended

    New Books and Publications- July 1, 1871

  • Departments

    Business and Personal- July 1, 1871

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July 01, 1871

Beyond XX and XY

Biology. Identity. Equality.