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Features

A Remarkable Straight Edge

A Suggested Lathe Improvement

Gauges for Mechanical Work

The Brown Stone Quarries of Connecticut

Our new Supplement Catalogue

Machine for Working Butter

Improved Saw Arbor

Car Track Cleaner

Sail Wagon

The Allen Dense Air Ice Machine

American Industries.-- No. 91

Portable Electric Testing Apparatus

Natural History Notes

The Tiger by Instantaneous Photography

An Old Universal Tool

Improved Claw Bar

Water Cooler

Engineering Inventions - June 14, 1884

Mechanical Inventions - June 14, 1884

Miscellaneous Inventions - June 14, 1884

Departments

  • Letters

    Correspondence - June 14, 1884

  • Departments

    Business and Personal - June 14, 1884

  • Notes and Queries - June 14, 1884

  • Index of Inventions - June 14, 1884

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June 14, 1884

Beyond XX and XY

Biology. Identity. Equality.