Ill 



ASCENT OF SAP IN STEMS 



73 



branch at the same time, the observable differences being 

 due to changes in conditions which affected the flow in 

 the living as well as in the killed branch. 



In Tables 6 and 7 is recorded an example of one of these 

 experiments, which is graphically recorded in Fig. 14. 



Particulars of Experiment. 



A and B, two similar branches of Syringa vulgaris, each 

 with five year-rings. 



A : length, 84'5 cm. long. Upper diam. of wood, 



11-6 



119 



12-7 



5 Time in hours 

 12-0 Temp, of 

 jacket 



Fig. 14. 



- 8 cm. ; of pith, 0"15 cm. Lower diam. of wood, 0'9 cm. ; 

 of pith, 0*23 cm. Head, 9*0 cm. of water. 



B : length, 83*5 cm. Upper diam. of wood, 0*73 cm. ; 

 of pith, 01 cm. Lower diam. of wood, 0*85 cm. ; of pith, 

 0*1 cm. Head, 9 3 cm. of water. 



Table 6. 



The cistern was emptied when the experiment had run 

 for 120 min., and B was surrounded with steam for 



