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The  Germination  of  Belladonna  Seed. 
|  Am.  Jour.  Pharm. 
\   November,  1914. 
The  effect  of  scratching  does  not  appear  to  be  as  great  as  was 
expected.  The  shaking  with  sand  gave  better  results  than  the  emery 
treatment.    Figure  10  shows  the  results  graphically. 
74  
64  \ 
6o 
So 
Fig.  io. — Curves  showing  effect  of  scratching  seed  coats.    (A)  Seeds  shaken  with  powdered 
glass;   (B)  seeds  rubbed  between  emery  paper;   (C)  check.    Seeds  sown  February  i6th. 
Summary. 
The  subjection  of  belladonna  seed  to  freezing  temperatures 
accelerates  their  germination.  Hence  it  is  of  benefit  to  sow  the 
seed  in  the  fall  in  order  to  insure  a  rapid  and  early  germination  in 
spring. 
