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A Tribute to American Shipbuilding, Could the Earth Collide with a Comet?, Patent Complexities in Great Britain

Engineering, Electricity, Science

Two Remarkable Shows

Novelties in Motor Boats and Aeroplanes

Rapid Progress of the New York State Barge Canal

A Record of Recent Achievement

The Anthracite Coal Beds of Alaska

By Day Allen Willey

Ostrich Farming as an Industry

By Newton Forest

The Bullet's Flight*

The Bullet's Flight from Powder to Target. The internal and external ballistics of small arms. A study of rifleshooting with the personal element excluded, disclosing the cause of the error at the target.lliustrated with188 plates. showing the results of over 300 rifle experiments performed and chronologically arranged. By F. W. Mann, B.S., M.D. Size 7 1/2 inches. 384 pages. Price $4 postpaid. New York, 1909. Munn & Co. Some Newly Discovered Errors in Target Shooting*

Tool-Holding Device for Wood Turning

By Chauncey W. Nieman

Electric Incubators and Brooders

By Frederick E. Ward

A Wagon Jack

By I. G. Bayley

Boring Holes in Glass

By George J. Murdock

Convenient Door Holder

By D. Pennington


  • Departments

    The Heavens in March

  • Recently Patented Inventions

  • New Books, Etc.

  • Index of Inventions

  • Notes and Queries

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