PREPARATIONS OP MANGANESE. 
299 
ganese is then reduced to powder and preserved for use. It 
consists of about two parts of carbonate to one of sugar, the 
object of which is to preserve it from oxidation. It may- 
be given in powder, pills, or mixture, as the prescriber may- 
desire. 
3rd. Combined with honey, in a pillular form like Vallet's 
carbonate of iron as recommended by M. Hannon, who gives 
the following formula. " Dissolve seventeen ounces of 
crystallized sulphate of manganese, and nineteen ounces of 
carbonate of soda, each in two pints of water containing 
two fluid ounces of syrup ; mix the solutions thoroughly, 
and suffer the precipitate to subside in a well stopped bottle. 
The supernatant liquid is decanted off, the precipitate washed 
with sweetened water and thrown on a cloth saturated 
with simple syrup to drain. It is then expressed, mixed 
with ten ounces of honey, and rapidly evaporated, (the ac- 
cess of air being prevented) to a proper consistence for 
making pills. The sugar and honey prevent the oxide of 
manganese from super oxidation. The dose is from four to 
ten pills, each four grains, every day, in chlorotic cases 
where iron has not succeeded. The hyperoxidation of 
carbonate of manganese may be prevented by adding fresh- 
ly prepared vegetable charcoal to the pills." 
Sulphate of manganese. On a small scale, pure sulphate 
of manganese may be prepared thus : — 
Take four ounces of sulphuric acid, mix it with twelve 
fluid ounces of water, and add moist hydrated carbonate of 
manganese, gradually, until the acid is saturated. Filter 
the solution, which has a light amethist color, evaporate it 
at a moderate temperature, till a crystalline pellicle com- 
mences to form, then set it aside in a drying closet, or 
for spontaneous evaporation. If an attempt is made to 
hurry the evaporation by ebullition a sub-hydrated sul- 
phate is thrown down in fine powder. 
On a larger scale this salt may be prepared directly from 
the native oxide, by mixing ten pounds of the black oxide 
