APPENDIX 



Figure 4 is included to illustrate pic- 

 torially the reactions of red salmon to 

 the electrical current. The prints are 

 enlargements of 16 mm. colored motion- 

 picture frames, exposed at 24 frames 

 per second. Each printed frame was 12 

 frames from the preceding one, thus the 

 time interval between prints was 1/2 

 second. 



By following one fish through a series 

 of frames one can see how the fish 



reacted to pulsing direct current. Some 

 of the fish visible at the water surfaces 

 near the fringe of the electrical field 

 can be seen escaping. But those which 

 were between the electrodes when they 

 were energized can be seen approaching 

 the location of the positive electrode 

 under control of the electrical current 

 and being electronarcotized well within 

 reach of the operator's dip net. In the 

 operator's hand is the on- off push button 

 which sent the current to the electrodes. 



MS. #979 



10 



GPO 898997 



