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The Limitations of Aerial Bombing, The Lampert Bill and more

Naval and Merchant Marine, Science, Automobile

Is It To Be Bomb or Battleship?

Elaborate Series of Tests to Determine the Effectiveness of Aircraft Against Warships

Saving the Sockeye

An International Reclamation Project That Remains To Be Settled

By Robert A. Campbell

The Rag-Doll Seed-Tester, A New Means of Carrying Plant Disease and more

Bridging the Delae at Philadelphia

A Two-Cable Suspension Bridge with a Main Span of 1750 Feet

Animal Tissue That Does Not Die

How a Bit of Chicken Heart Has Been Kept Alive and Growing for More Than the Chick's Span of Life

By Harry A. Mount

The Condensing of Milk

How It Is Carried Out and Its Economic and Vital Importance to the Country

By Robert G. Skerrett

A Rocking Stone from Buenos Aires, Berlin's Forthcoming Skyscraper and more


  • Departments


  • The Heavens for July, 1921

  • Inventions New and Interesting

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