334 



Popular Science Monthly 



Much of the danger of driving on snow is eliminated by the 



use of these skiis on the front wheels. They travel lightly 



over the snow, and by responding promptly to the wheel 



make skidding less likely 



Motoring on Skiis 



MOTORISTS who know the diffi- 

 culties and dangers of piloting 

 their cars through heavy snow, will greet 

 with approval a new device which is 

 claimed to make snow-driving safe, prac- 

 tical and comfortable. 



Two kiln-dried white ash skiis are fas- 

 tened securely to the front wheels, and 

 carrv them over the surface of the snow. 

 In deep snow the full width of the skiis 

 carries the load, while on a hard path 

 only the steel guide runner touches the 

 road. The guide runner also makes 

 steering easy and prevents the skidding 

 of the front wheels. 



Does Your Child Suck It's Thumb? 



IT is very seldom that we see a straight, 

 well-formed mouth. Sometimes it is 

 spoiled by protruding teeth, sometimes 

 by a large overhanging upper jaw, gen- 

 erally we find the upper lip much larger 

 than the lower. This is not. as might 

 at first be supposed, a characteristic of 

 the American people just as flat noses 

 are a characteristic of the Negro race. 



rubber 

 during 



and 

 all 



It is due to one of the 

 most unfortunate habits 

 that can be formed in 

 childhood — the sucking 

 of the thumb. 



The bones of a baby's 

 jaw are extremely plas- 

 tic, and subject to al- 

 most any amount of de- 

 formity by long-contin- 

 ued impact and strain. If 

 even as soft an object as 

 a thumb is placed in the 

 mouth for any length of 

 time, the inevitable re- 

 sult will be that the up- 

 per jaw and the teeth 

 will be pushed out 

 of place. 



Many mothers are 

 aware of the dan- 

 ger in making such 

 a habit, and they 

 resort to what they 

 think is the next 

 best thing — which 

 is in reality the 

 next worst thing — 

 the pacifier. Imag- 

 ine a bit of hard 

 in a child's mouth 

 waking hours, and 



ivory 

 of its 



many times its sleeping ones. It is 

 nothing more or less than an instrument 

 which rapidly and skilfully dislocates the 

 teeth and the jaws. A child should not 

 be permitted to carry any object in its 

 mouth aside from the rubber nipple of 

 its bottle, and even here care should be 

 taken to see that this is removed prompt- 

 ly after the feeding is over. 



It is not easy to prevent the baby 

 from putting its fingers into its mouth, 

 as this is more or less of a natural in- 

 clination. In rare extreme cases it is 

 necessary to tie the hands. Many par- 

 ents put a bitter solution on the fingers 

 which is sufficiently distasteful to break 

 up the practice, but this is a doubtful 

 procedure and one to resort to only by 

 the advice of a physician. 



PENNSYLVANIA leads all other 

 states in the country in the use of 

 steam power, using twenty per cent, of 

 all that is used in the entire United 

 States. 



