72 



STUDIES IN PHYSIOLOGY 



of the different animals he attached to the collar of each dog 

 a Waterbury watch adjusted in such a way that it would tick 

 once each time the animal moved, and so at six o'clock each 

 day he could determine and set down the record made by 

 each dog. He found that for a period of two months and 

 more "Bum" was only 71% as active as "Nig," while 

 "Tipsy" moved about only 57% as much as "Topsy "; in 

 other words the two alcoholic dogs lost 25% to 50% of their 

 activity. 



Bum. 



Tipsy. 



Nig. 



Topsy. 



FIG. 19. The appearance of the four spaniels six months after the ex- 

 periments were begun. (Copied from "Physiological Aspects of Liquor 

 Problem," by permission of Dr. Hodge and of Houghton, Mifflin & Co.) 



A second series of experiments was made to determine 

 the comparative endurance of the four dogs and their ability 

 to accomplish things. The animals were all taught to retrieve 

 a rubber ball when it was thrown the length of the gymna- 

 sium floor, a distance of 100 feet. At each trial the ball was 

 thrown 100 times, and a record was kept of all the dogs that 



