WATSON AND LASHLEY 



PLATE 5 



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METHOD OF TESTING SWIMMING BEHAVIOR. 



Fig. 1 . Noddies and sooties after spending night on the water. The two noddies are in good condition. 

 One sooty is drowned and the other is shown, in lower left hand corner, in a very poor condition. 



Fig. 2, 3. Illustrating the noddies' quick possession and retention of the blocks. The sooties have left the 



blocks and are slowly becoming water-logged. 

 Fig. 4. The test with floating blocks. One sooty failed to use the block and is in poor condition. 



