ON  THE  MEDICINAL  PREPARATIONS  OF  GLYCERIN.  159 
changes,  particularly  it  does  not  become  rancid  ;  its  preparations 
may  be  used  like  any  oily  embrocation ;  they  will  be  readily 
absorbed  by  the  skin,  which  afterwards  may  be  washed  with  a 
little  water  ;  wounds  after  they  have  been  dressed  with  such  a 
preparation,  may  easily  be  washed  out  with  warm  and  even  cold 
water ;  chirurgical  instruments  can  be  cleaned  with  much  less 
difficulty. 
The  glycerin  that  has  been  used  by  the  authors  is  of  28° 
aerometer,  and  contains  about  12  per  cent,  of  water ;  for  the 
preparations  therewith  they  propose  the  name  of  glyceroles. 
Their  first  object  was  to  ascertain  the  degree  of  solubility  in 
glycerin  of  the  different  medicinal  preparations,  the  results  of 
which,  as  compared  with  their  solubility  in  water,  alcohol  and  oil, 
we  give  in  the  following  table,  —  signifying  insoluble,  0  decom- 
position. 
Name  of  bodies. 
Sulphur, 
Sulphuret  of  potassium 
"  calcium, 
Iodine, 
Iodide  of  sulphur, 
"  potassium, 
Biniodide  of  mercury, 
Proto-iodide, 
Corrosive  sublimate, 
Calomel, 
Quinine, 
Sulphate  of  quinia, 
Tannin, 
Tannate  of  quinia, 
Morphiae, 
Muriate  of  morphia, 
Strychnia,  . 
Nitrate  of  strychnia, 
Veratria, 
Brucia, 
Atropia, 
Tartar  emetic, 
The  solutions  of  the  s 
Olycerin. 
2000 
10 
10 
100 
GO 
8 
340 
14 
200 
48 
6 
130 
19 
300 
26 
96 
70 
50 
30 
Soluble  in  parts  of 
Alcohol. 
20 
0 
5.55 
200 
2.50 
45 
0.50 
52 
50 
40 
120 
70 
Water. 
2 
500 
rooo 
Oil. 
110 
82 
1.33  — 
—  62 
740  — 
1  — 
—  1200 
20 
6667 
50 
1.50  1000 
1.50 
2 
850 
350 
14 
800 
200 
100 
100 
120 
35 
ulphurets  must  be  kept  excluded  from  the 
air  ;  on  addition  of  water  only,  they  exhale  the  smell-  of  sul- 
phuretted hydrogen.  The  solutions  of  iodine  and  iodide  of 
sulphur  have  a  smell  resembling  that  of  saffron.  An  addition  of 
water  precipitates  some  iodide  of  mercury. 
When  heated  glycerin  dissolves  l-40th  of  sulphate  of  quinine, 
