24 



PLATE I 



L. 





A. Screw jack working against anchored 

 cable, forcing soil tank 6 feet into 

 the ground to capture undisturbed soil, 



Soil sampling equipment: compressor 

 unit (on truck), pne\imatic driving 

 hammer (in operator's hands), ordinary 

 soil tube hammer (on ground) and soil 

 tube jack. 



