72  Gleanings  from  the European  Journals.  {ia5S££iSS^ 
8  per  cent,  of  sulphate  of  quinia  may  be  employed  for   1  day. 
4  days.. 
16  hours.. 
10  " 
19  " 
1  day.. 
25      "        "  hyposulphite    "  " 
33      "        "  hydrochlorate  "  "  44 
50      "        u  formiate          44  "  44 
25      "        "  acetate           44  44  " 
50      "        u  sulphovinate    44  44  44 
50      44        "  lactate            u  44  " 
33      44        44  tannate           44  44  44 
If  these  solutions  are  kept  at  a  temperature  of  30°  C.  they  re*- 
main  limped  for  8  to  15  days. — Ibid.,  359-364. 
To  detect  an  admixture  of  alcohol  in  volatile  oils,  R.  Bcettger  re- 
commends to  agitate  the  suspected  volatile  oil  in  a  graduated  tube, 
with  an  equal  bulk  of  pure  glycerin,  spec,  gravity  1*25,  which  m 
readily  soluble  in  alcohol,  but  does  not  combine  with  the  volatile  oiL 
The  diminution  in  volume  of  the  latter  indicates  the  amount  of  the 
admixture. — Ohem.  Centr.  Bl.,  1872,  No.  47,  from  Jahresb.  d.  phys± 
Ver.  zu  Frankfurt. 
Constituents  of  sweet  almonds. — Professor  Ludwig  communicates 
the  results  of  an  investigation  made  in  the  laboratory  at  Jena  by  E. 
Scheitz,  in  1865,  who  found  besides  fixed  oil,  albuminous  compounds* 
emulsin  and  cellulose,  also  glucose,  a  chromogen  glucoside  (yellow> 
becoming  cherry  red  with  alkalies),  small  quantities  of  amygdalin  and 
tannin  which  reacts  green  with  iron  and  is  doubtless  contained  in  the 
outer  integuments. — Archiv  d.  Pharm.,  1872,  Nov.,  420-423. 
*  Estimation  of  camphor  in  alcoholic  liquids. — Hager  distils  the  liquid 
in  a  water-bath,  the  distilled  alcohol  containing  the  greater  part  of 
the  camphor,  is  mixed  with  an  equal  volume  of  water  and  agitated 
with  one-tenth  volume  of  bisulphide  of  carbon.  After  separation,  a 
portion  of  the  hydroalcoholic  liquid  is  returned  to  the  flask  and  re- 
distilled from  a  glycerin  bath  at  110°  C.  The  distillate  contains  all 
the  camphor,  is  added  to  remaining  mixture  and  bisulphide  of  carbon, 
mixed  with  more  water  and  twice  agitated  with  carbon  bisulphide. 
The  latter  solvent  has  taken  up  all  the  camphor  and  volatile  oils  if 
present.  This  solution  is  evaporated  spontaneously  in  a  tared  glass 
dish  with  straight  sides  at  an  atmospheric  temperatgre  not  exceeding 
15°  C,  the  temperature  of  the  dish  being  lowered  by  the  evaporation 
to  5  to  10°,  preventing  the  evaporation  of  the  camphor  almost  com- 
