42 
Number of be | Me ha 
TGE cou | Spirema | LEEN | yee ‚ Diaster | ie young 
Wigan, {is BMI NEE bt Maer 
21/ p.m. | 3308 | 4 | 1 | 2 1 | — — 
64 p.m. Dat de, ot ees 4.) Li 
10 Us p.m. 3066 9 4 Pent) Si) sl 2 | _— 
21/s a.m. 4152 | 11 2 10 : 1 8 
7 am. 2750 10 2 4 10! Jef rn 
= 
| 
Time of fixation Percentage of 
karyokineses 
101 a.m. 0.03 + 0.03 
2% p.m. 0.12 + 0.06 
6'% p.m. 0.35 + 0.12 
10'% p.m. | 1.37 + 0.21 
21 a.m. | 0.86 + 0.13 
i alain | 1.05 + 0.19 
As in the first case we notice here a time with a minimum number 
of karyokineses and another with a maximum number. 
The minimum occurs at the same time as in the preceding case, 
namely at 10'/, a.m. In 3167 nuclei I only met a single karyokinesis 
i.e., including the probable error, from 0.06 to 0,00°/,. The time of 
the maximum number is here at 10°/, p.m. At 2'/, a.m. aconsider- 
able decrease in the number of nuclear divisions is already noticed ; 
at 7 a.m. a slight rise. If we take the probable error into account, 
however, we perceive that the limits of the numbers cover each 
other, the percentage at 2'/, a.m. being from 0,73 to 0,99, at 7 a.m. 
from 0,86 to 1,24. 
At 2*/, and at 6 p.m. we have transitions from the minimum at 
10'/, a.m. to the maximum at 10'/, p.m. Here also it is noticed 
that in the daytime the number of nuclear divisions is very small, 
during the night and in the early morning hours karyokinesis is not 
unfrequent. The time of the maximum number is here later than 
in the preceding case. 
As to the various stages, no distinct succession can be noticed 
