AM'octu?;i^uRM'}     Calcined  Magnesia  in  Mixtures.  467 
of  the  water  until  f^xiv  are  obtained,  strain  all  through  a  finer  strainer, 
add  the  glycerin  and  bottle;  the  bottle  is  to  be  kept  well  corked. 
Dose: — f^i,  containing  giii  of  the  beef. 
The  physician  in  prescribing,  can  order  the  addition  of  brandy, 
pepsin,  or  any  other  medicine  he  wishes  to  administer  at  the  same 
time.  I  tried  combining  ferric  pyrophosphate  with  the  mixture;  it 
combines  well,  but  makes  a  dark,  unsightly  preparation,  on  account 
of  the  combination  of  the  iron  with  the  blood  contained  in  the  beef. 
Philadelphia,  August,  1874. 
CALCINED  MAGNESIA  IN  MIXTURES. 
By  Hans  M.  Wilder. 
Some  time  ago,  I  received  the  two  following  prescriptions: 
T.  Magnes.  list*,  .....  gii. 
Aquae  destill.,           .....     ^ii.  n^. 
II.  Magnes.  ustse,  ..... 
Bals.  copaivae,  .  ...  da  £i. 
Aq.  camphorae,  .  £v. 
Syrup,  tolu,  .  .  .  .  t^i. 
Spir.  aeth.  nitr.,  ....  gii.  yx^. 
As  both  prescriptions  were  written  very  plainly,  and  no  objections 
otherwise  could  be  made  to  them,  I  dispensed  them  to  the  letter,  al- 
though I  knew  that  both  mixtures  would  become  solid  in  a  short  time. 
I  was  hereby  induced  to  examine  whether  it  would  not  be  possible  to 
keep  them  in  a  liquid  state,  at  least  for  a  few  days.  An  observation 
of  Mr.  Gobley's  (Amer.  Jour.  Pharm.,  xvi,  1845,  p.  273),  that  the 
presence  of  sugar  would  retard,  if  not  altogether  prevent,  solidifica- 
tion, led  me  to  try  the  addition  of  sugar  also. 
I  consequently  made  eight  mixtures  : 
1.  One  part  light  calcined  magnesia  and  eight  of  water. 
2.  The  same,  but  submitted  to  boiling. 
3.  One  of  light  calcined  magnesia  and  eight  of  simple  syrup. 
4.  One  of  light  calcined  magnesia,  six  of  water  and  two  of  syrup. 
5.  The  same,  submitted  to  boiling. 
6.  One  of  light  calcined  magnesia,  four  of  water  and  four  of  syrup. 
Further : 
7.  One  heavy  calcined  magnesia  (Powers  &  Weightman),  and  eight 
of  water. 
8.  The  same,  submitted  to  boiling. 
