..FISHING STUB 



WATER ^ 

 CHAMBER --- 



-CAMERA HOUSING 



Figure 355. General principles of operation of deep-well camera (upper left). Gen- 

 eral construction and arrangement of parts (upper right). Camera assembled 

 and ready to go into well (lower left) ; this view shows "push-over" springs that 

 hold picture window of camera close to wall of bore hole. Effect of depth of 

 turbid well fluid on sharpness of picture (lower right) ; figures on inclined scale 

 represent inches of immersion of scale in murky water. 



