Page:Popular Science Monthly Volume 92.djvu/205

 Popular Science Monthly

��The Steel-Plated, Helmeted Knight of the Trenches

BA C K in the Middle Ages the doughty war- riors went to battle fully armored. In times of impending danger, the knight's squire must have spent about a half day getting his mas- ter into his trap- pings.

Beside the exhibit of ancient armor stands a modern British Tommy. He too, is steel- plated. And thus does progress move in circles. For ar- mor is coming back into use again.

At all times the wearing of armor is limited by three principal condi- tions; the weight of the type available, the kind of weapons and ammunition in use by the enemy, and the degree of movement expected of a soldier. If the weight is too great, the soldier soon tires; if the enemy is using high-pow- ered guns at close range, armor isof lit- tle use; and if a sol- dier must run about, steel appendages are in the way.

���Steel helmet and chest-covering of the modern British soldier on left make him resemble knight in armor of old (right)

���189

Use Your Hot Radiator Water to Keep Your Steering-Wheel Warm

'^pHE happy idea X of utilizing the boiling water in the automobile radiator and the red-hot gases from the en- gine for keeping the driver's feet warm, has already been presented in the Popular Science Monthly.

Charles C.Walker, of Utah, has now finished this job by devising an arrange- ment for similarly warming the chauf- feur's hands.

The hollow in- terior of the steering wheel is con- nected across a part of the circulation system of the en- gine. By means of a pair of valves, the flow of the hot wa- ter can be regulated to give a delightful warmth. Hands were meant to be warm and radiator water to be cold. This idea benefits both ways.

If the water is too hot to be con- trolled easily, the exhaust engine gases can be used.

��Mot wate

��/i^Hollow Steering wheel Hot water i4l Hot water Dice return pipx

���Hot exhaust gas connection witn steering whee'

��Warming the steering wheel with water from the radiator tank. At left is shown how the water and the exhaust gases can be utilized for this purpose. At right is shown the wheel arrangement by which the hot water cir- culates through the rims

���\ Water return to radiator

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