90 



THE BOTANICAL MAGAZINE. 



[Vol. XXII. No. 256. 



Second collection. Aug. 5. 



In lot No. 2. (Fig. 2) the range was nearly equall to that 

 of the former collection, but the higher frequency on 12-14 of 

 the former was much lowered here, leaving only a slight mode 

 on 14 (not on 13), and the mode on 16 was strongly developed, 

 19. 89^ of variates falling into that class. The variates on and 

 above 17 were also more or less increased. Both the mean and 

 coefficient of variability^ were therefore greater than the former. 



In that of the valley (Fig. 3) the mode rose on 16 still 



more eminently', including 23.5^ of the variates in it the 



greatest of all the lots. The lower variates decreased more and 

 more, especially on 11 to 13, and no mode was seen. Of the 

 higher variates, that on 17 to 19 are relativelj^ larger in num- 

 ber, and the other abruptly decreased, but with the extremity 

 on 26. The frequency-polygon tended thus to the monomodal 

 symmetry. The mean was slightly greater than that of the lot 

 No. 2, and it was the maximal value through all the lots. The 

 standard deviati ^n has, on account of the monomodal condition, 

 decreased so much, that the coefficient of variability was the 

 least of all the lots. 



{To he Continued.) 





