OF SAP IN PLANTS. 



35 



March 8. Up to 4 



— 9 



— 10 



— 11 



12. 



H 



2i 

 5i 



7i 



2 



5 



7 



21 



5i 



7i 



2 



cub 



— 13. 



— 14. 



4f 



31i 



33 



12 



As there was no fixed result here, the holes A and B were 

 bored out again to remove any accidental obstruction. 



March 12. Up to 5 o'clock at A, 5 cub. in. ; at B, 9 cub. in. 

 .. 7\ .... 

 2 

 .51 .... 2 



.. 7i .... ^ 



- .. .2 .... 3 J 



A was closed up, and a new hole C bored near it. 



March 14. Up to b\ o'clock, from C, 5 cub. in. ; fromB, l;^cub. in. 



— 15. . . 7i .... I . . none. 



— .. ..11 .... 3.. 4 drops. 



Thus, from the 8th to the 11th of March more flowed from 

 below; from that time the proportion was reversed, perhaps 

 in consequence of the more powerful swelling of the lower 

 {wetter) wood at A, and a contraction of the orifice resulting 

 from this. After a new hole was bored, the proportion was as 

 in ordinary cases (compare Experiments 20 and 21). 



The specific gravities of the fluids from A, B, and C, exhi- 

 bited the following scale : — 



March 8. Spec. grav. of A, 25*705 gramm. ; of B, 25*715 

 — 9 25*690 



10. 

 11. 

 12. 

 13. 

 14. 



25*712 

 25*728 

 25*722 

 25*718 

 25*714 



— 15. Spec. gfav. of C, 25*732 



25*717 

 25*719 



3* 



