EFFECT OF CONJUGATION 



297 



TABLE 7 



Experiment 2. Relative variability in fission rate for those that have conjugated 

 and those that have not. 



The split pairs and the free may therefore properly be con- 

 sidered together, as non-conjugants, as in the fourth column of 

 table 6. With these total results for all the individuals that 

 have not conjugated may then be compared the results for those 

 that have conjugated, as in columns 5 and 6 table 6. As there 

 shown, for the first week the excess of the non-conjugants was 

 85 per cent, so that their rate was nearly double that of the con- 

 jugants. After this the excess for the non-conjugants decreased, 

 although even in the eighth week it is 18.8 per cent. Thus the 

 conjugants had not regained a rate equal to that of the non-conju- 

 gants even after so long a period. 



Variation. The variation in the rate of fission is shown com- 

 paratively for conjugants and non-conjugants in table 7. In this 

 table the two classes of non-conjugants — the 'split pairs' and the 

 'free' — have been put together, since we have already seen from 

 table 6 that there is no characteristic difference between them. 

 This fact is shown equally if we compute the variation separately 

 for the two classes. Thus, for the first week the split pairs give 

 a standard deviation of 1.458 and a coefficient of 19.767, while 

 the corresponding figures for the free are 1.425 and 18.542. For 

 the second week the figures are: split pairs, 1.180 and 41.998; 

 free, 1.023 and *45.785; first two weeks, spht pairs, 2.011 and 

 19.375; free, 2.285 and 22.628. Throwing the two together, as 

 in table 7, gives the great advantage of larger numbers. 



