AmAP°rnr;5o3arm'}    Recent  Literature  Relating  to  Pharmacy.  183 
obtained.  In  the  publication  of  results  it  is  expected  that  the  writer 
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RECENT  LITERATURE  RELATING  TO  PHARMACY. 
THE  COMPOSITION  OF  INDIA-RUBBER. 
At  a  recent  meeting  of  the  Northwestern  section  of  the  American 
Chemical  Society  at  Boston,  Mass.,  Dr.  C.  O.  Weber,  of  Manchester, 
England,  gave  an  account  of  researches  on  rubber.  India-rubber, 
no  matter  from  what  source,  is,  when  freed  from  albuminous  and 
resinous  substances,  composed  of  two  substances:  one,  amounting 
to  4  per  cent,  or  less,  is  insoluble  in  all  solvents,  and  corresponds  to 
the  formula  C30H68O10 ;  the  other  is  a  hydrocarbon,  nC10H16.  On 
