HYDRAULIC DREDGES FOR CHANNELS 



127 



spud as a center, and the material is principally deposited on shore 

 or at a distance through the floating discharge pipe. 



Referring to the illustrations, Fig. 37 is a deck plan and longi- 

 tudinal section of the dredge by which the general arrangement 

 of the machinery, crew's quarters, etc., may be seen. Fig. 38 shows 

 cross-section at the pump. Fig. 39 shows the dredge with cutter 

 raised. 



The hull of the dredge is 32 ft. wide, 125 ft. long and 7 ft. 6 in. 

 deep. It is built square-ended at bow and stern, with corners well 

 rounded and a rake on the under body fore and aft in order to make 



FIG. 38. Cross-section of the Dredge "King Edward VII." 



it fairly easy to propel. By referring to the cross-section it will be 

 seen that the bilges are rounded and that the frame of the vessel 

 is built cf steel, while the plank and sheathing are of wood. By 

 this construction great strength is obtained, the steel frames being 

 practically indestructible, while the planking can be renewed at 

 any time when necessary from injury or decay. This form of con- 

 struction was also especially suitable for erection on the Pacific 

 coast, as the entire frame of the hull could be fitted and erected 

 at the works where built, leaving only the planking to be purchased 

 and put on at place of erection. The hull is stiffened by two additional 

 steel trusses extending the entire length. These trusses are 15 ft. 



