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Features

Science and Spiritualism

The Transplantation of Nerves

Speed and Air Resistance in Cycling

A False Alarm

A Pertinent Question

Method of Transferring Photographic Films

Armor Plate for Bank Vaults

Water-Tube Boilers for our Warships

By Lieut. G. L Carden

Prevention of Collisions at Sea

Meeting of the American Association for the Advancement of Science

An Ingenious Bicycle Gear

Automobile Brougham for a City Physician

An Improved Hanger for Grindstones

The Mosasaurs

By L. P. Gratacap

The Mossberg Tire-Bell

The Theory and Construction of Ball Bearings

By W. H. Hale

Typical Perpetual Motion Fraud

The Proposed East River Tunnel

"Deutschland"--The Latest and Fastest of the Transatlantic Liners

Departments

  • Recommended

    New Books, Etc - July 1, 1899

  • Departments

    Recently Patented Inventions - July 1, 1899

  • Notes and Queries - July 1, 1899

  • Business and Personal - July 1, 1899

  • Index of Inventions - July 1, 1899

  • Patents - July 1, 1899

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