138 



individuels is exceedingly small. At about size x = 35, 

 this growth begins to increase with great rapidity. It 

 rises to a high maximum for sizes between 50 and 70 

 mm, after which it again diminishes. 



The whole case shows the greatest analogy with the 

 next example and the explanation suggested by the reac- 

 tion curve is much the same. 



Example VL ^) (Stalk-length of Linum crepitans, meas- 

 ured at a moment in which the growth had not yet 

 ceased by Miss A. Haga (Tab. 8 Fig. 11). 



The frequency curve is again two topped. It might be 

 described as a fairly common sort of curve with an 

 enormous accumulation near the lower extremity. 



About the treatment of this curve I will quote the 

 words of 2nd paper p. 68. „As this might be a good test 

 „case, we requested that no particulars should be com- 

 ,,municated before we had derived the normal function (2) 



„and the reaction curve ( ', ) in the ordinary way." 



As a conséquence we knew nothing of the nature of 

 the object measured, safe that (as the numbers came from 

 the botanical laboratory) they were in ail probability 

 relative to plants or parts thereof. 



The reaction curve found and shown in the figure 

 „starts from zéro and then rises extremely abruptly. A 

 „maximum however is soon leached at about x = 27, 

 „after which it steadily decreases, so that the reaction 

 „(growth) for x = 100 is already below half what it is at 

 ..maximum. 



,.The meaning of this is of course, that the individuels 

 ..evidently hâve great difficulty in starting their growth. 

 „There seems to be an almost insuperable impediment 

 ..against beginning growth. Those individuals however. 



Kindly communicated by Miss Dr. Tammes. 



