1Ö2 



Coopcrati re lurextii/atioiis <ni Phnits 



(6) It inay be uscful to exaniiiie the intcrracial result fVom the correlation 

 staiidpoint, although at present we have rather mcagre data. We have cight local 

 series ; considering them of oqual weight, although the Belgian aud Swiss series 

 are very inferior in niimber to ours, we find : 



Mean of local uicans for stamens 

 Mean of local means for pistils 

 Variability of local meaus for stamens 

 Variability of local nieaiis for pistils 



= 26-498 ± 1-321 

 = 19-432 + 1 2G5 

 = 5-5409 ± -9343 

 = 5-3037 + -8943 



Correlation of local means for stamens and pistils = -9514 + 0235. 



The probable errors are very high because we have only eight paii-s. It is there- 

 fore difficult, perhaps, to make a definite statenient that the interracial is greater 

 than the avcrage intraracial variability, biit it appears like it ; even the relative 



Ci, 





Sninber u/ Stamens in liacial Meait. 



Order of variability of pistils and stamens may be changcd whon we pass from 

 intraracial to interracial constants. Qn the othcr band the correlation is so liigh * 

 that we can make a very definite statenient about it, i.e.: 



The interracial correlation of the mean numbers of staniens and pistiln is very 

 mitch greater than the mean intraracial correlation between stamens and pistils, 

 being to the latter nearlij in the ratio of 12 to 7. 



• Aud thcrcfore iU probablu error even with only cight psirs, so flinall. 



