Volume 118, Issue 18
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Features
The Delay in Airplane Production, An Army of 5,000,000 Men, and more
Aurora Australis, Building a Bridge in Six Weeks to Save a Half Hour, and more
Building a bridge to the Squantum Destroyer Plant near Boston, Mass., to save workers half an hour of commuting time.
New Dutch Export Industry
Flowers that Fertilize Themselves
Some Notable Exceptions to Nature's General Principle of Cross-Breeding
Coal and Electricity in Double Harness
What England is Doing to Work Out the Problem of Fuel Conservation
The Pneumatic Water Works
Pushing Water Up-Hill Before a Head of Compressed Air
Getting the Most Out of the File
A Serious Study of a Common Tool Whose Proper Use Calls for Much Practice
Steam-Driven Forty-five Ton Tank for Our Army, Discarded Bottles for Dug-Out Windows, and more
Mechanical Equipment of the Farm- May 4, 1918
Latest developments in agricultural machinery and practical suggestions for the farmer