Correspondence. 
Am.  Jour.  Pharm. 
March,  1919. 
United  States  Pharmacopoeia. 
Suggestions  for  the  U.  S.  P.  X. 
(Use  a  separate  sheet  for  each  subject:  additional  sheets  may  be  obtained 
from  the  chairman,  Charles  H.  LaWall,  39  S.  Tenth  Street,  Philadel- 
phia, Pa.) 
Subject  Discussed   '  
Brief  Abstract  of  Recommendation  
Details  
Reasons  for  Proposal  
Date  
Signature  
Address  
CONCERNING  THE  INFLUENCE  OF  STEMS  AND  ROOTS 
UPON  THE  ALKALOIDAL  CONTENT  OF 
STRAMONIUM. 
New  York,  N.  Y.,  Feb.  18,  1919. 
Dr.  Geo.  P.  Koch, 
Care  of  H.  K.  Mulford  Co., 
Glenolden,  Pa. 
Dear  Sir:  I  found  your  article  in  the  American  Journal  of 
Pharmacy,  January,  1919,  on  the  alkaloidal  content  of  stems,  roots 
and  leaves  of  stramonium  quite  interesting  and  instructive. 
I  would  be  glad  to  have  a  little  further  information  regarding 
the  samples  identified  as  223-4  and  5.  I  would  assume  from  the 
statements  •  on  page  13  that  these  represent  composites  of  samples 
nos.  211-12  and  13  with  10  per  cent,  of  samples  nos.  214-15  and 
16.  It  is  at  once  evident,  however,  that  my  understanding  is  not 
correct  or  that  there  has  been  a  misprint. 
If  10  per  cent,  of  samples  nos.  214-15  and  16  were  added  to 
samples  nos.  211-12  and  13  in  the  order  indicated,  the  resulting 
mixtures  would  assay  approximately  0.55,  0.56  and  0.40. 
