Extensive tests subsequently undertaken in the laboratory 

 for the further development of this accessory guiding mechanism re- 

 sulted in some success in guiding or "leading" certain species of 

 fishes to a desired point in a body of water. Unfortunately, other 

 limitations of this "leading" device which tended to reduce its util- 

 ity presented themselves during the experiments. Details of these 

 experiments will be presented in a separate report. V Subsequent 

 experiments in 19!? 2 demonstrated other methods of holding mortality 

 of migrating fishes to a minimum (See "Summary of results in 1952"). 



3/ McLain, Alberton L. and Willis L. Nielsen. Directing the movements 

 of fish with electricity. (Scheduled for publication as a Special 

 Scientific Report, U. S. Department of the Interior, Fish and Wildlife 

 Service). 



10 



