r  Am.  Jour.  Pharni. 
420  Salicylic  Acid  and  Monad  Salts.  {Amse™ 
der  1*4  per  cent  of  a  brownish-green  semi-liquid  fixed  oil,  which  was 
readily  saponified  and  was  soluble  in  ether,  chloroform  and  carbon 
bisulphide.  Ether  now  took  up  5*33  per  cent,  of  a  green  semi-solid 
resin,  soluble  in  chloroform,  benzol  and  absolute  alcohol,  and  impart- 
ing to  water  or  acidulated  water  a  greenish  color,  but  no  decided  taste. 
Alcohol  dissolved  from  the  residuary  powder  1*60  per  cent,  of  resin- 
ous extract,  free  from  tannin,  alkaloid  and  glucoside.  The  powder 
gave  to  water  4*84  per  cent,  of  extract,  of  which  2*25  per  cent,  were 
shown  to  be  sugar  by  Fehling's  solution,  and  0*60  per  cent,  of  mucil- 
aginous matter  was  left  undissolved  by  alcohol  of  66  per  cent. 
SALICYLIC  ACID  AND  MONAD  SALTS. 
By  R,.  Roth  ek. 
It  is  known  that  the  solution  of  salicylic  acid  in  water  is  enorm- 
ously augmented  by  the  presence  of  certain  salts  of  the  monad  metals, 
and  that  the  resulting  solutions  have  the  physiological  effects  of  free 
salicylic  acid.  It  was,  however,  shown  that  in  these  combinations  the 
acid  is  not  free  in  any  sense,  but  that  normal  salicylates  and  acid 
monad  salts  are  formed. 
In  consideration  of  these  facts,  the  writer  attempted  the  solution  of 
benzoic  and  gallic  acid  on  the  same  principle. 
It  was  found  that  benzoic  acid  is  entirely  inert  in  this  connection 
under  the  usual  circumstances,  but  that  it  liberates  some  acetic  acid 
from  potassium  acetate  on  heating  their  mixture. 
Gallic  acid  is  much  more  energetic  but  adversely  so  as  it  generates 
sparingly  soluble  monad  gallates. 
Trials  were  then  made  with  salicylic  acid  and  various  other  salts 
than  those  heretofore  used  in  such  cases.  It  was  found  to  have  no  ef- 
fect with  sulphates  and  hypophosphites,  but  it  readily  decomposed  tar- 
trates, pyrophosphates  and  borates.  There  are  doubtless  many  other 
such  saline  combinations  producible  in  this  manner,  but  no  others  were 
sought. 
This  peculiar  reaction  led  to  the  question  of  its  special  chemical 
character  and  the  subsisting  interrelations  of  the  products.  Hence 
the  writer  examined  acetates,  citrates,  tartrates,  phosphates,  pyrophos- 
phates and  borates. 
POTASSIUM  ACETATE  AND  SALICYLIC  ACID. 
The  addition  of  acetic  acid  to  a  simply  aqueous  solution  of  a  sali- 
