396 



BOTANICAL GAZETTE 



[NOVEMBER 









\ 







TABLE I 





















No. 





Gain 





No. 





Gain 





No. 





Gain 



No. 



Amount 



Amount 



of 



Gain 



per 



Amount 



of 



Gain 



per 



Amount 



of 



Gain 



per 









days 





day 





days 





day 





days 





day 





May 



May 









June 







June 











13, '09 



29, 09 







■ 



3> °9 









15, 09 









I 



3 



S 



12 



2 



0.17 



S 



9 



O 



0.00 



35 



12 



30 



2.50 



2 



3 



5 



12 



2 



O.17 



20 



9 



IS 



I.63 



25+ 



12 



5 



0.42 



3 



8 



8 



12 



O 



0.00 



24 



9 



16 



1.78 



X 



12 



X 



m± 



X 



4 



12 



15 



12 



3 



0.25 



40 



9 



25 



2.78 



35 



12 



? 



? 



5 



12 



18 



12 



6 



O.50 



30 



9 



12 



*-33 



40 



12 



10 



0.83 



6 



12 



20 



12 



8 



O.67 



30 



9 



10 



1. 11 



35 



12 



5 



0.42 



7 



8 



13 



12 



5 



O.42 



40 



9 



27 



3 



40 



12 







0.00 

 0.67 



8 



X 



10 



12 



X 



X 



30 



9 



20 



2.22 



38 



12 



8 



9 



8 



11 



12 



3 



0.2s 



40 



9 



29 



3.22. 



45 



12 



5 



0.42 



IO 



6 



10 



12 



4 



0.34 



21 



9 



11 



1.22 



30 



12 



9 



0.75 



ii 



a; 



X 



12 



X 



X 



25 



9 



X 



X 



42 



12 



17 



I.4 2 



12 



ii 



8 



12 



? 



X 



x 



9 



X 



X 



17 



12 



X 



X 



Looking at the average gain per day, we see that in cutting 6 the 

 greatest increase occurred, while above and below the amount of 



However 



Compa 



gain varied irregularly with the differen 



gain in the apical shoot was but slight. 



May 25 with those of June 3, it is evic 



tion of the apical shoot, the average daily increase at the latter 



date was greater in everv case than in the former. In other words, 



with 



time. 



from 



diameter, with the exception of the termi 

 May and the first of June than before ti 



considerably with the cutting and obeys no general law 



The 



J 



15, however, 



most interesting. There was a 



growth between June 3 and June 15, with the 



exception of the apical shoot. Here 



in 



formation 

 gradual d 



j 



great as that of all the diameter growth 



There was then a very marked increase in 



the 



urease in the remainder of the tree. Unfortunately, 

 however, data are not available bearing on the rate of elongation 

 of the apical shoot. It would appear, however, that its elongation 

 must have been very rapid up to June 3, so much so in fact that the 

 increase in the width of the annual ring could not result. From 

 June 3 to June 15 the rate of elongation probably decreased appre- 



