A%archr;iP9ooarm'}     Recent  Literature  Relating  to  Pharmacy.  133 
Emulsum  Terebeni. 
Each  teaspoonful  contains  : 
Terebene  .  .  .*   ...         3  m.      cri8  c.c. 
Acacia, 
Sugar,  of  each,  sufficient. 
Water,  to  measure   1  fi.  dr.  4  c.c. 
Dose  :  One  to  two  teaspoonfuls. 
• 
MANUFACTURE  OF  BORAX. 
Boric  acid,  ammonia  and  sodium  nitrate  are  mixed  in  the  pro- 
portion indicated  by  the  following  equation  : 
2B203  -f  2NH3  +  2NaN08  +  H20  =  Na.2B407  -f  2NHJMO3. 
Just  sufficient  water  is  added  to  dissolve  the  ingredients.  The 
chemical  reactions  produce  enough  heat  to  warm  the  solution, 
which,  on  cooling,  deposits  crystals  of  borax.  These  are  separated 
from  the  ammonium  nitrate  solution  by  means  of  a  centrifugal  ma- 
chine.— Eng.  Pat.,  No.  862,  January  13,  1899.  L.  F.  K. 
ITALIAN  BEESWAX. 
A.  Funaro  gives  the  following  constants  for  pure  beeswax :  Spe- 
cific gravity,  0-961-0-964 ;  melting-point,  63-64-4°  C. ;  acid  num- 
ber, 21-22;  saponification  number,  91-96;  index  of  refraction,  42- 
45°. — LOrosi,  22,  109.  L.  F.  K. 
SODIUM  HYPOCHLORITE  CRYSTALS. 
To  obtain  these,  a  solution  containing  about  400  grammes  of 
available  chlorine  per  litre  is  subjected  to  a  low  temperature,  when 
a  considerable  deposit  of  crystals  will  take  place. — Eng.  Pat.,  No. 
25,925,  December  8,  1898.  L.  F.  K. 
A  NEW  INDICATOR. 
A.  E.  Sunderland  and  A.  E.  Rhodes  (J.  Sac.  Dyers  and  Colorists, 
1899,  75,  206)  recommend  the  diazo  compound  of  para-nitranilide 
and  propylmetacresol  as  an  indicator  in  alkaline  and  acid  work, 
It  is  a  powder  insoluble  in  water,  but  soluble  in  water  containing 
30  or  more  per  cent,  of  alcohol.  It  can  replace  lacmoid  in  esti- 
mating the  hardness  of  water ;  is  more  sensitive  than  phenolphta- 
lein,  is  serviceable  for  organic  acids  and  equal  to  methyl  orange  for 
estimating  ammonia.    It  is,  however,  sensitive  to  carbonic  acid  and 
