296  Examination  of  Chlor alky d rate.  {L^\mT' 
The  results  of  the  analysis  No.  I  and  III  indicate  that  1000  parts 
of  the  water  contain  the  following  (anhydrous)  compounds. 
I 
III 
Sulphate  of  copper, 
0-0470 
Ferric  sulphate, 
0-0295 
Ferrous  sulphate,  . 
4-9004 
0-4608 
Sulphate  of  manganese, 
trace 
trace 
44  aluminum, 
0-8428 
44  magnesium, 
0-1504 
0-1320 
44  calcium, 
1-0520 
0-2630 
44  sodium, 
0-0120 
0-0098 
44  ammonium, 
00105 
0-0198 
Acid  arsenious, 
0-0008 
0-00099 
44  silicic, 
0-0(310 
0-0230 
44  carbonic, 
0-2720 
0-1790 
Ferrous  oxide,  }    .  ,  ~.r. 
{::::: 
0  0671 
Alumina,  j 
0-0472 
Organic  matter. 
trace 
0-0190 
Total,  . 
7-3784 
1-22769 
J.  M.  M. 
EXAMINATION  OF  CHLOR  A  LH  Y  D  R  AT  E. 
By  Charles  Rice. 
Dr.  Hermann  Hager,  in  one  of  the  numbers  of  his  j<  mnal  [Pliar- 
maceutiscJie  Centrallialh,  April  24,  1873),  has  drawn  attention  to  the 
chloralhydrate  manufactured  by  Saame  &  Co.,  *of  Ludwigshafen, 
which  had  enjoyed  a.  high  reputation  for  purity,  but  of  which  there 
were  then  some  lots  in  the  market  which  were  far  from  being  pure. 
Dr.  Hager  obtained  several  samples,  and  examined  them  with  the 
following  results  ; 
Its  solubility  was  normal,  but  the  solution  had  an  alkaline  reac- 
tion. 
2.  The  solution,  acidulated  With  HO,  N05,  gave  a  white  cloud  with 
AgO,  N05.  If  not  acidulated,  it  gave  a  white  cloud,  which  speedily 
turned  black. 
3.  A  ^sample,  heated  on  platina  foil,  left  a  white  residue,  which 
turned  brown  at  an  incipient  red  heat. 
