( 297 ) 
Under observation were only branches without genitals; those 
with catkins gave a different result *). 
Branches of 1'/,—4 mM. diameter (wood and bark together). 
March 24th 3.2 pCt. *) 
April 47th 2 1 
May, 21% 04 , 
Branch of 4—8 mM. diameter (only bark; hence the quantity is higher). 
March 24th 4.1 pCt. 
Apri 17 2807 
May ALS A Sp 
For Salix Helix L. the figures for the bark of branches were 
March 24% 4.4 pCt. 
April 27 2.7 
The quantity of glucose is a little variable ; however, it does not 
rise above 0.5 pCt.; the quantity of fecula diminishes when budding 
from 9.5 pCt. to 6 pCt. 
In the young buds of Salix purpurea there is before the budding 
4.4 pCt. and of Salix Helix 6.2 pCt. During the budding this quantity 
decreases greatly, disappears even for 5. purpurea entirely (17 April) 
but rises again quickly, when assimilation begins, to 3.7 pCt in leaves 
and 3 pCt. in young shoots (21 May). 
Of the absolute quantity of salicine in a branch with 300 buds 
+ 36 pCt. disappeared from 24 March—17 April 
se 18, 1" „ 17 March—21 May, 
the assimilation, begun already before May 21, having given rise to new 
salicine. 
Experiments with branches placed in the dark in water*) showed 
the following: 
After the roots have been formed, a number of long etiolated shoots 
bud forth, consuming by their development besides the fecula also 
a great quantity of the salicine in the bark (+ 70 pCt). 
At first the young shoots contain a great quantity 7.2 pCt., this, 
however, keeps on decreasing; the absolute quantity calculated for 
100 young shoots also diminishes : 
for 100 young shoots long 18 mM. there is 28 mG. salicine 
/ I I I nt DA Su " „15 # " 
1) The quantity of salicine is at the same instant lower in branches with 
catkins than in those without; the salicine diminishes more quickly. 
2) These procentic values are calculated for dry weight. 
5) These were branches of 6—10 m.M. diameter, the young shoots coming from 
sleeping buds. 
20% 
