122 



Kleinere Mitteilungen. 



scepticism that RoSEN has aroused in the minds of enquirers into heredity 

 by his recent important researches. Does one wish to set the concept of 

 pure line or homozygote in dependance on the longer or shorter time which 

 elapses between the divisions in the offspring. I recall the well-known fact 

 of NilsSON-Ehle, who for a long time worked with a "pure line" and 

 had suddenly to experience one day that he actually had to do with a 

 "heterozygote". 



§ 3- 

 In the analysis of the frequency curves, in the same sense as it has 

 been repeatedly developped in these transactions I have in some instances 



come across an appearance that will be further dealt with in this paragraph. 

 It concerns namely the suddenly stopping latent either for ever or during 

 a given time of one or more "properties" in the such a sense as I have 

 always expressed in this treatise. The first instance of such a latency I 

 met with in a Coffea Cancplwra. This instance is set down in the imme- 

 diately following Curve III, and has reference to leaf-length. 



It is as one sees a complexity of measurements, viz: — from 13 to 

 and with 15 c. m., that suddenly after the g''' branch-pair no longer 

 manifests itself. This latency is maintained in twelve successive 

 branch-pairs: after the 21^' branch-pair these vanished measurements 

 reassert themselves in a very decided manner. 



