NUMBER OF OVA: ALBINO RAT pie 
from twenty-three to sixty-three days the number of ova with 
slight ‘variations diminishes from 10,746 (twenty-three days) to 
10,185 (sixty-three days). From sixty-three days on it de- 
creases rapidly at first, then rather steadily to 559 days, dropping 
markedly at the last entry for 947 days. 
TABLE 3 
The relation between the age and the number of ova in both ovaries; the average 
numbers. This is the fundamental table used for the discussion 
NUMBER OF 
NUMBER OF OVA CORPORA 
angR= | ee LUTEA 
‘or | YAHOF | AGE |weronipenor| PP [ a [| a | a [8 
Seas RES | eel Ng |e 
ge |2|2/se| 8 |2/8\s 
cP Ss |e TEC eee aie tie 
days days | grams | mm. | mgm. 
4 1-7 L 9.3) 56 26,898 | 584 1 27,483 
2 10-15 12 lesa 80 2.3 | 14,954 | 506) 181 15,641 
2 20-26 23 | 26.9| 92] 8.6] 9,877 | 362] 372| 138) 10,746 
3 30-36 341) 326) “112. 17.6) | “9; 787205156) 96) 105196 
3 41-46 43 63.2} 1384 | 11.8 | 10,479 | 196} 98) 63) 10,836 
2 50-50 50 75.0} 145 | 12.1 | 10,193 | 217| 86} 57| 10,553 
3 60-64 63 89.7| 147 | 16.4 | 9,760] 245) 129} 51) 10,185} 2) 3) 5 
1 70 | 106.3] 162 | 43.8 | 6,246 | 197} 99) 64) 6,606] 9) 22) 31 
3 80-84 81 | 103.2] 153 | 23.0 | 7,489 | 217| 114) 80), 7,850) 9) 8) 17 
a 95-100 97 | 108.4| 156 | 28.6 | 7,237] 162) 84! 65) 7,548] 12} 9] 21 
2 {110-110} 110 | 130.7| 166 | 30.1 | 6,195| 241) 88) 44) 6,568 | 20/ 10) 30 
3 |140-198] 163 | 131.7) 170 | 47.1 | 6,583| 209! 117) 41] 6,950) 21) 23) 44 
2 1206-262} 234 | 166.7| 184 | 51.9 | 5,659| 141) 83) 24) 5,909 | 47) 27| 74 
2 |318-385| 351 | 158.4) 192 | 59.2 | 4,814] 174) 90) 24) 5,102 38) 21) 59 
1! 454 | 138.7] 194 | 33.8 | 4,465] 160) 78) 56} 4,759) 67| 26; 98 
1 559 | 198.9] 200 |-73.5 | 4,729] 107| 37] 20) 4,893 | 27) 11) 38 
1 - 947 |.238.0| 215 | 65.2 | 1,709'} 128) G61)" 21) 1,919 | 90) 18/108 
Chart 2 shows two sharp drops; the first drop extends from four 
to twenty-three days and the second extends from sixty-three to 
seventy days, with a period of relative constancy between twenty- 
three and sixty-three days. The significance of these phases 
will be taken up later (p. 440). 
Since the total number of ova includes ova of various sizes, I 
have attempted to analyze the general graph—chart 2—into its 
