PREPARATIONS OP MANGANESE. 
301 
Take of Crystallised sulphate of manganese, 16 drachms. 
Iodideof potassium, 19 " 
Sugar, and water, each a sufficient quantity. 
Dissolve the sulphate of manganese and iodide of potas- 
sium each in three fluid ounces of cold water, containing 
two drachms of syrup, and mix them in a glass stopped 
bottle, and after the crystals of sulphate of potash 
cease to precipitate, throw the solution on a filter of fine 
muslin, and allow it to pass into a pint bottle containing 
twelve ounces of powdered sugar. When the solution has 
ceased to pass, wash the filter with a little water, and then 
add sufficient of that fluid to make the whole measure one 
pint. Finally agitate the bottle until the sugar is all dis- 
solved. This preparation contains about one drachm of 
solid iodide of manganese to each fluid ounce, which is the 
strength of the officinal solution of iodide of iron. 
The dose varies from ten drops to half a fluid drachm. 
Pills of Iodide of Manganese. — M. Hannon recommends 
these to be made by mixing equal quantities of iodide of 
potassium, and dried sulphate of manganese, and forming a 
mass with honey, which should be divided into pills, each 
containing four grains. They should be kept in a well 
stopped bottle. The dose is one pill daily, gradually in- 
creased every three days to six pills. They are then 
omitted eight days, after which their use is resumed. 
Phosphate of Manganese. 
Take of Sulphate of manganese, four ounces. 
Phosphate of soda, five ounces. 
Water, a sufficient quantity. 
Dissolve tne sulphate and phosphate severally in two 
pints of water, mix the solutions, wash the precipitated 
phosphate, till the sulphate of soda is removed, press it be- 
tween the folds of bibulous paper, and dry it at a moderate 
temperature. 
Phosphate of manganese is a white, nearly insoluble 
powder. M. Hannon gives formulae for pills, syrup and 
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