Am.  Jour.  Pharm. ) 
July.  1901.  J 
Story  of  the  Pa  paw. 
343 
white  precipitate,  also  soluble  in  an  excess  of  the  acid  (proteid 
reaction).  This  precipitate  turns  yellow  and  dissolves  upon  heating 
(albumose),  but  upon  cooling  is  again  precipitated.  Upon  adding 
an  excess  of  acid  it  is  completely  dissolved  and  not  re-precipitated 
when  cooled  (globulin). 
The  presence  of  soluble  globulin  in  an  aqueous  solution  is  further 
shown  in  that  the  precipitate  produced  by  boiling  is  not  soluble  in 
hydrochloric  acid  (0-2  per  cent.). 
The  residue  left  upon  the  extraction  of  the  dried  milk  with  water 
Water  method  of  drying  latex  of  papaw. 
is  partially  soluble  in  a  weak  solution  of  common  salt,  and  the 
resulting  solution  gives  a  precipitate  with  nitric  acid  (globulin). 
The  watery  solution  noted  above,  when  rendered  slightly  acid 
(acetic)  and  boiled,  is  made  turbid,  forming  small  amount  of  floccu- 
lent  precipitate  (globulin  and  albumin). 
The  clear  watery  extract  of  the  papaw  latex,  when  saturated 
with  ammonia  sulphate,  gives  an  abundant  white  precipitate  with 
strong  proteid  reaction  (the  precipitate  carrying  the  greater  por- 
tion of  the  ferment).  The  precipitate  just  noted,  freed  from  the 
ammonium   sulphate,  dissolved  in  water,  made  acid  with  acetic 
