PR 
70 
60 
60 
40 
30 
20 
10 
CL 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 
I— V 5 DAYS RIGHT ORAL 
FR 
50 
40 
30 
20 
10 
lj 
CL 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 
I— V 6 DAYS RIGHT ANAL 
689 
THB JOURNAL OF EXPERIMENTAL ZOOLOGT, VOL. 9, NO. 4. 
