52 



THE WORLD'S ADVANCE 



valley floor and dammed the river, 

 creating the Celilo falls and rapids 

 around which the locks are built. 



Construction of the canal began in 

 October, 1905. There are five locks, 

 with ten passing basins for vessels, that 

 overcome an 82- foot fall made by the 

 river between the head and foot of the 

 ditch. The minimum depth of water in 

 the canal is eight feet. 



Owing to the fact that the river an- 

 nually experiences a heavy flood, spill- 

 ways are built along the canal walls 

 at regular spaces to relieve pressure from 

 flooding, while the sixty-ton lock gates 

 are each braced against concrete stands, 

 21 feet wide, to withstand the tremen- 

 dous weight of water which they must 

 bear against. The lock gates are oper- 

 ated by hydro-electric power. 



IMPROVISED ELECTRICAL 

 PLANTS FOR WAR 



Power plants of the Benz type are in 

 general use by the German Army in the 

 field, for the immediate utilization of the 

 captured French and Belgian plants. 



SAFETY LOCK FOR SLEDGE 

 HAMMERS 



To minimize the possibility of injury 

 to workmen when a sledge hammer is 

 being used, a safety lock has been devised 

 consisting of three steel castings. One 



The German Army is Using this Type of Electric Generating Plant Mounted on Wheels and which can 

 be Immediately Installed at Any Desired Point for Supplying Current for Illumination and 



Other Purposes. 



The accompanying illustration shows a 

 plant wherein a traction motor of the 

 Benz system is furnishing the necessary 

 current to a field hospital. As for every 

 other military task, soldier specialists 

 also operate the improvised plants. 



is a circular flange cut with a hole slightly 

 tapered into which two wedges fit. Two 

 holes are drilled in the head of the sledge 

 to conform to the holes in the flange. 

 The wedges are then fitted to the handle 

 close to the head of the sledge, the ring 



