SEISMIC METHODS 



883 



Fig 556.— Portable drill with gasoline-electnc motor drive to rotary table 

 A gasoline engine direct-connected to generator; B electric motor driving 

 Totary tabfe; C, rotary table; D, gasoline engine direct-connected to mud 

 pump; E, Kdly; F, mud hose; G, swivel. (Courtesy of Seismograph Service 

 Corporation.) 



Fig 557.— Water truck. A, 500-gal. water tank; B, "A" frame hoist; C, 

 sheave wheel; D, guide sheave E, roller; F, guide sheave; G, guide sheaves 

 for winch line: H. auxiliary SO-gal. gasoline tank; I, storage box- J drinking^ 

 water can, with large top opening for ice and cleaning; K vertical guard 

 posts, for extra lenlths of 10' drill pipe;L luggage rail, for supplier; M, 

 suction hose. (Courtesy of Griffin Tank and Welding Company.) 



