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THE WORLD'S ADVANCE 



The Many Difficulties of Pile-Driving Have Been 



Eliminated in This New Pile Which Bores Its 



Own Hole. 



DRIVING A PILE WITH WATER 



The difficulty of driving concrete piles 

 into the ground with the ordinary pile 

 driver has been eliminated in a concrete 

 pile recently invented, which is driven 

 by boring its own hole with a stream 

 of water forcibly ejected at the point. 



An iron pipe forms the core of the pile, 

 and water is forced through at high 

 pressure, eroding the earth as the pile 

 proceeds. Sand and earth are dissolved 

 and rocks are washed away. The water 

 pressure is 250 pounds. 



NEWTON'S GRAVITY THEORY 

 UPSET 



A California professor has made the 

 statement that Newton's law of gravity 

 is incorrect. After years of experiment 

 he is now able to prove conclusively, he 

 says, that gravitation is transmitted with 

 the velocity of light. 



Whether or not this professor's claims 

 are well founded, his theory is at least 

 very interesting. Gravitation comes to 

 the earth from the sun, according to his 

 hypothesis, and reaches here in eight 

 minutes. 



MODEL LOCOMOTIVE BUILT BY 

 APPRENTICES 



In an effort to determine the ability 

 of apprentice boys who were being giv- 

 en engine shop instruction, an eastern 

 railroad recently put to the boys the 

 task of building a small locomotive and 

 a workshop. The apprentices went to 

 work with enthusiasm. Amateur 



Apprentices of the Erie Railroad Shops and the Model Locomotive Which They Constructed. 



