Science: Iron Ration K

Genghis Khan solved the iron-ration problem by issuing each of his soldiers a straw so that his warriors could thus tap their horses' veins and drink the fortifying blood. The U.S. Army believes it may lick the iron-ration problem with Field Ration K—a three-meal package of concentrated food, which contains 3,726 calories and can be packed in a heat-and-cold-proof, 6-by-6-by-4-in. box.

On Mt. Rainier, miles away from regular mess facilities, mountain troops lived on Ration K for days, came through fit as fiddles. At Indio, Calif., where the temperature ran as high as 122° in the shade, a five-day trial gave equally...

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