Am.  Jour.  Pharm, 
October,  1902. 
'•}    American  Pharmaceutical  Association. 
491 
and  all  the  organic  matter  destroyed  before  using  the  acidimetric 
test  in  salts  like  benzoate  and  salicylate  of  sodium.  In  the  test  for 
creosote,  175  grammes,  instead  of  1-3  grammes,  of  sodium  hydrate 
to  every  4  c.c.  of  creosote  should  be  used.  In  solution  of  hydrogen 
dioxide  the  text  should  tell  how  much,  if  any,  acid  and  the  kind  of 
acid  that  should  be  permitted  for  preserving  it. 
The  following  papers  were  presented,  which  are  herewith  given  in 
abstract : 
An  abstract  of  this  paper  was  presented  by  Henry  Kraemer, 
Philadelphia.  The  paper  dealt  particularly  with  preliminary  experi- 
ments which  had  for  their  object  the  establishment  of  the  constitu- 
tion of  scopolin.  On  the  treatment  of  the  latter  with  hydrobromx 
acid  it  is  changed  into  a  dihydroxyl  derivative,  which  action  he 
explained  by  supposing  that  one  of  the  oxygen  atoms  is  arranged  in 
a  morpholine-like  combination.  The  author  stated  that  one  of  three 
possible  constitutional  formulas  may  be  ascribed  to  scopolin,  and 
subsequent  work  should  reveal  the  true  constitution. 
On  Guaiac-Blue  and  Aloin-Red  and  Their  Use  for  Chemical 
Charles  Caspari,  Jr.,  read  an  abstract  of  this  paper,  in  which  the 
author  points  out  the  sensitiveness  of  guaiac-blue  and  aloin-red  reac- 
tions, the  analogy  between  them,  and  indicated  the  instances  when 
they  may  be  of  particular  value  in  chemical  analysis:  (1)  In  the 
detection  of  aloes,  i.e.,  aloin ;  (2)  in  the  detection  of  the  presence  of 
different  cyanic  compounds  and  of  haloid  salts ;  (3)  in  the  detection 
of  free  ammonia  in  air  or  in  distillates ;  (4)  for  the  detection  of  cop- 
per in  the  form  of  cupric  salts;  (5)  for  the  detection  of  active 
organic  substances  able  to  carry  oxygen. 
The  Chemistry  of  the  Stem  of  Derris  Uliginosa  Benth. 
(An  Eastern  Fish  Poison.) 
By  Frederick  B.  Power. 
An  abstract  of  this  and  the  following  paper  was  presented  by 
Charles  Caspari,  Jr. 
Concerning  Scopolamin  and  Scopolin. 
By  Ernst  Schmidt,  Marburg, 
Germany. 
Reactions. 
By  Ed.  Schaer,  Strassburg,  Germany. 
