REVIEW OF THE DUBLIN PHARMACOPOEIA. 
13 
lifting off the matrass the purified product will be found attached to 
to its bottom. When separated, it should be immediately enclosed 
in a bottle furnished with an accurately ground stopper." 
We presume the first sublimation is intended to detect and re- 
move any iodide of cyanogen which may happen to be present. 
Arsenici et Hydrargyri Hydriodatis Liquor, or Donovan's solu- 
tion, is made directly from its elements by the published process of 
Mr. Donovan. We prefer to make it from the iodides of arsenic 
and mercury, previously prepared. 
Hydrargyri Iodidum Viride ; means protiodide of mercury. 
Potassii Iodidi Liquor Compositus, means a solution of five 
grains of iodine and ten grs. of iodide of potassium in a pint of 
distilled water. 
Linimentum Cantharidis, is made by digesting three ounces of 
powdered cantharides, in twelve fluid ounces of olive oil for three 
hours, then expressing and straining. 
Linimentum Crotonis, is a mixture of a fluid ounce of croton 
oil with seven fluid ounces of oil of turpentine. 
Arsenicum Purum, indicates metallic arsenic. The following 
process is given for its preparation. Take of white oxide of arse- 
nic two drachms. Place the oxide at the sealed end of a hard 
German glass tube of about half an inch in diameter and eighteen 
inches long, and, having covered it with about eight inches of dry 
and coarsely pulverised charcoal, and raised the portion of the 
tube containing the charcoal to a red heat, let a few ignited coals 
be placed beneath the oxide so as to effect its slow sublimation. 
When this has been accomplished the metallic arsenic will be 
found attached to the interior of the tube at its distant or cool ex- 
tremity." 
Directions are given for preventing the stoppage of the tube, by 
the accumulation of the sublimate, (with an iron wire,) and for 
avoiding the fumes. 
Ferri Pulvis, means iron reduced by hydrogen, and for which a 
formula is given ; a gun barrel is used as the reduction tube. 
Hydrargyri Pernitratis Liquor. — Under this name the acid ni- 
trate of mercury solution, of the hospitals, is intended. 
It is directed to be made by dissolving two ounces of mercury 
in a fluid ounce and a half of nitric acid (sp. gr. 1.5) diluted with 
2 
