Feature

Chiggers Do Not Burrow but Attack as Ticks Do

New Machines and Gadgets

Nature Ramblings: Was It Courage?

Front Matter

Time of Death Told by Taking Temperature

Jet Stream Predictions Are Now More Accurate

[Photograph]: Supersonic Wind Tunnel

Polio Preventive Trial

Machines for Future Wars

Boom in Requests for Educational TV Channels

Fire Weather Forecasts

More Electric Railroads