538 



BOTANY AND PHARMACOGNOSY. 



of amygdalin is higher, whereas when the" exposure is such that 

 the cells do not take an active part in photosynthesis the per cent. 



Fig. 23 s. Fruiting branch of wild black cherry (Prunus serotina). 



of amygdalin is lower. In the latter case the bark is yellowish- 

 brown. On keeping the bark for a year it deteriorates from 10 to 

 50 per cent. 



