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Protection from Lightning

Effects of Heat in the Comstock Mines

Freezing in Fire

The Elevated Railway Extension.--Details of Construction

American Industries.--No. 21

Pushing an Iron Bridge Across a River

Mechanical Inventions

Modification of the Reynier and Werdermann Electric Lamp

By Geo. M. Hopkins

The Blake Transmitter

A New Fish Way

Miscellaneous Inventions

Recent Decisions Relating to Patents, Trade Marks, Etc.

By Judge Wheeler

A New Wrench

Engineering Inventions

New Motor and Meter

The Great Sea Cow of Florida

By Daniel C. Beard

Arrow Poisons

Arabesque Cabinet

Communications Received


  • Departments


  • Business and Personal

  • Notes and Queries

  • New Books and Publications

  • Index of Inventions

  • Patents

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