140 CALVIN P. STONE 



of Rat 65. Eyes removed at age of sixty-eight days. Tested 

 age of seventy-six days for copulation for periods of twelve min- 

 utes and sixteen minutes but no attempts at mounting were 

 made. Tested at age of eighty days. Copulation followed the 

 introduction of the female into the cage in forty-five seconds. 

 Frequency of the act normal. Autopsy showed complete 

 destruction of olfactory bulbs. 



Rat 32. Operated at the age of thirty days to render anosmic. 

 Operation successful. Conditions of confinement same as those 

 of the other two above. Eyes and vibrissae removed at age of 

 sixty-eight days. Tested for copulation at age of seventy-six 

 days for periods of twelve minutes and sixteen minutes with no 

 signs of sexual excitement. Tested at age of eighty days. Copu- 

 lated four and one-half minutes after female was placed into the 

 cage. Autopsy showed complete destruction of olfactory bulbs. 



The anosmic rats in which the act of copulation was initiated 

 in the absence of smell only were subjected at a later time to 

 other observations following the removal of their eyes. The 

 results of these tests follow: 



Rat 23. (Anosmic and sexually experienced in copulation.) 

 First copulation at age of seventy-five days. Operated at age 

 of eighty-one days to remove eyes. Tested for copulation at 

 age of eighty-eight days, seven days after eyes were removed. 

 Copulated four seconds after female was placed in cage. Record 

 for one half hour was thirty-seven copulations. 



Rat 24. (Anosmic and sexually experienced in copulation.) 

 On seventy-sixth day of age copulated for period of thirty minutes. 

 Eyes removed at age of eighty-one days. Tested at age of 

 eighty-two days, one day after eyes removed. Copulated seven 

 seconds after female entered cage. Record for one half hour was 

 twenty-nine acts. 



D. Vision, olf action and taste. The taste receptors were 

 effectively controlled and eliminated as factors in the initiation 

 of the copulatory response without destruction of the special 

 end organs. The anosmic animals observed ceased all vaginal 

 exploration when brought into the company of the female after 

 the olfactory bulbs were destroyed. Young anosmic animals 



