342 



Mr F. Darwin and Mr R W. Phillips, [Nov. 23, 



(i) Cut through h of diameter 



12-54 

 55 



90-9 

 90-9 



(ii) Increased the cut to T |^ diameter 



12-57 

 1-2 



73-5 



85-5 



(iii) Cut through ~ diameter*, opposite (ii) : 



Ml 



30 



5-7 

 59 



Other examples will be given later, when the sources of error 

 in the experiments are discussed. 



Exp. 8. Beech (Fagus sylvatica). Aug. 13, 1884. 

 p.m. Rate 



4-28 91 



36 91 

 (i) 38 Sawed through half 



39 I 85 



46 | 86 

 (ii) 48 Sawed half through, opposite and 2 cm. 

 above (i) 



50 26 



5-3 37 



15 43 



The experiment shows : the small effect of the first cut ; the 

 larger effect of the second ; slow and partial recovery after the 

 second cut. 



Exp. 9. Ivy (Hed&i^a helix). Aug. 16, 1884. Here the cuts 

 were made at 22 and 24 cm. from the base of the branch, and 

 26 and 28 cm. from the first side branch. 



Rate 

 63 



(i) 



(ii) 



p.m. 



5-17 



5-17 



to 



5-20 

 23 

 38 

 39 



45 

 6-53 



Sawed nearly half (yy) through . 



43 



56 



Sawed 2 cm. higher up, and opposite 



(i) ; more than half ( TT ) through 

 10 

 10 



In this case there was partial recovery after the first cut, but 

 no signs of it after the second. 



* Diameter of branch 15 mm. Incisions at li and 16 cm. from the cut end. 



