292 
on  the  Solvent  powers  of  simple  syrup. 
Place  all  together  in  a  bottle ;  shake  frequently  for  a  week  \ 
allow  the  lime  to  subside  ;  and  in  three  weeks  the  preparation  is 
ready.  Dose,  a  teaspoonful  in  a  wine-glass  of  milk.  This 
syrup  is  less  bulky  for  exhibition,  is  more  pleasant  to  the  taste, 
keeps  better,  is  far  more  powerful  than  Aqua  Calcis,  and  we  feel 
certain  that  any  who  have  once  used  Syrupus  Calcis  will  never  go 
back  to  the  old  lime  water. 
The  writer  next  tried  the  power  of  <  Syrupus'  to  dissolve  arseni- 
ous  acid.  A  sufficient  quantity  of  this  acid  was  boiled  with 
<  Syrupus'  for  fifteen  minutes,  and  the  whole  filtered,  This  syrup 
had  an  acid  reaction,  and  a  very  unpleasant  metallic  taste.  It 
was  impossible  to  burn  off  the  sugar,  as,  according  to  the  results 
of  Dr.  J.  K.  Mitchell,  arsenious  acid  is  sublimed  below  300°  F. 
But  arsenite  of  potash  is  not  volatile,  and  accordingly  the 
writer  added  a  sufficient  amount  of  caustic  potash  and  of  nitre 
to  f.gvii.  of  syrup,  and  then  burnt.  The  ashes  were  dissolved 
in  dilute  hydrochloric  acid  and  precipitated  with  sulphuretted 
hydrogen.  The  precipitate  collected  on  a  weighed  filter,  dried 
and  weighed. 
Filter  +  contents    ......  26.09 
do.   —    do   10.49 
Contents  consisting  of  ter-sulphuret  of  arsenic  16.60 
This  gives  13.6  in  seven  drachms,  or  about  15.54  grains  of 
arsenious  acid  are  dissolved  by  one  ounce  of  6  Syrupus.'  We  pro- 
pose the  following  formula  for  this  preparation  : 
R.  Acidi  Arseniosi       ....       grs.  lii. 
Lacmi      .       .       .       .  .       q.  s. 
Syrupus  Oj. 
Digest  the  litmus  and  syrup  together  for  a  few  days,  add  the 
arsenious  acid,  boil  and  strain.  Dose,  five  to  ten  drops  in  a  wine- 
glass of  water.  Among  many  of  the  profession  arsenious  acid  is 
preferred  to  Fowler's  solution  (witness  the  so-called  Liq.  Arsenici 
Chloridi,  Ph.  Lond.,  which  is  nothing  but  arsenious  dissolved  in 
hydrochloric  acid) ;  with  such,  the  above  preparation  will  pro- 
bably meet  with  favor. 
The  writer  next  examined  the  power  of  6  Syrupus'  to  dissolve 
Bismuthi  Subnitras,  but  obtained  no  interesting  results,  although 
