500 
Analysis  of  the  Empire  Spring,  etc. 
f  Am.  Joub.  Pharm. 
I    Nov.  1,  1872. 
have  a  zero  point,  and  a  very  convenient  one  is  that  which  corres- 
ponds pretty  nearly  to  the  generally  understood  limit  between  bases 
and  acids,  and  depends  upon  the  direction  in  which  the  action  A-f- 
water=B+hydrochloric  acid  takes  place  ;  where  A  is  a  chloride  and 
B  a  hydrated  or  anhydrous  oxide. — Pharm.  Journ.  and  Trans.,  Sept. 
28,  1872.  
ANALYSIS  OF  THE  EMPIRE  SPRING  AT  SARATOGA,  N.  Y. 
By  C.  F.  Chandler,  Ph.  D.,  &  F.  A.  Cairns,  A.  M. 
This  celebrated  spring  has  recently  been  subjected  by  us  to  a  care- 
ful analysis  with  the  following  results  : 
One  United  States  gallon  of  231  cubic  inches  contains  : 
Chloride  of  Sodium, 
OUD.DOU 
grains 
\_y  1  J.  H  H  1 U.  C   Ul   J-  \J  l/Clooi  Ulil  ,                      •  • 
4.292 
(t 
Bicarbonate  of  Magnesia, 
42.953 
u 
Bicarbonate  of  Lime,  . 
109.656 
a 
Bicarbonate  of  Lithia, 
2.080 
a 
Bicarbonate  of  Soda, 
9.022 
C6 
Bicarbonate  of  Baryta, 
0.070 
a 
Bicarbonate  of  Strontia, 
a  trace. 
Bicarbonate  of  Iron, 
0.793 
a 
Bromide  of  Sodium, 
.  0.266 
tc 
Iodide  of  Sodium, 
0.006 
a 
Sulphate  of  Potassa,  . 
.  2.769 
a 
Phosphate  of  Soda, 
0.023 
a 
Silica, 
.  1.458 
a 
Alumina, 
0.418 
a 
Fluoride  of  Calcium,  ^ 
Biborate  of  Soda,         Veacn  a  trace. 
Organic  Matter,  J 
Total,  . 
Carbonic  Acid  Gas, 
New  York,  Aug.  14,  1872. 
.  680.436  grains. 
344.669  cubic  in. 
— American  Chemist,  Sept.  1872. 
CANTHARIDES. 
By  R.  Rother. 
The  recent  paper  of  Prof.  Dragendorff  on  cantharidal  plaster  in- 
duced the  writer  to  try  the  proposed  process.    This  is  based  upon  an 
