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 

 modem 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 steer- 

 ing 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 



