NUMBER OF OVA: ALBINO RAT 443 
increase in the weight of both ovaries. When the corpora lutea 
do appear, the number of large degenerated follicles remains 
about the same (namely, twenty-seven) from sixty-seven up to 
133 days, but after that period is reduced to about half, namely, 
fifteen, and this value is maintained up to 506 days. At 947 days, 
however, the number of large degenerated follicles becomes only 
TABLE 13 
The relation between the weights of both ovaries and the middle-sized and large 
degenerate follicles, arranged by age in days; the average number 
NUMBER OF DEGENERATE FOLLICLES 
NUMBER OF INTERVAL OF WEIGHT OF 
RATS AGE BOTH OVARIES 
Middle Large Total 
Rats without corpora lutea 
days days mgm. 
1 26 LORS a4 9 92 101 
3 30-36 34 7.6 63 44 107 
3 41-46 43 11.8 56 35 91 
4 50-64. 56 10.6 36 19 55 
2 80-95 87 7 LORS 36 26 62 
2 100-110 105 13.8 33 12 45 
Rats with corpora lutea 
2 64-70 67 37.4 55 26 81 
2 80-84. 82 29.8 21 28 49 
2 95-100 97 46.8 32 27 59 
2 110-150 13383 41.1 32 28 60 
3 198-262 222 53.9 22 13 30 
2 318-385 352 59.6 17 16 33 
2 454-559 506 iso 7/ 24 17 4] 
1 947 6522, 4 6 10 
six, yet the weight of the ovaries is 65.2 mgm. Similar relations 
appear when the numbers of degenerated follicles are arranged 
according to the weight of both ovaries instead of age. 
As was already stated, the precise number of small degenerated 
follicles is hard to determine on account of the lack of any dis- 
tinct character, such as the presence of a nucleus in the ovum. 
However, some notion of even an approximate number is highly 
desirable. 
