ON THE PROTO-IODIDE OF IRON, &C. 
117 
with atmospheric oxygen, either hecause it is in contact with 
carbonic acid, (carbonated water,) or enveloped in gum, or 
gelatine, or honey — substances which have the property of 
preserving the salts of the protoxide of iron from oxidation by 
contact with the air, from which a partial decomposition 
would result, that is to say, an alteration. 
The first formula is that of the radical medicine, that is to 
say, of the preparation which I have constantly employed for 
the treatment of phthisis in the Hotel Dieu: it is for this rea- 
son that I have named it the normal solution of the proto- 
iodide of iron. 1 desire that physicians should prescribe it 
under this title, and for greater certainty, to add the name of 
the author, so that this medicine may not be confounded with 
the pretended proto-iodide of iron of Pharmacy, which, I re- 
peat, is of the first importance in a therapeutical point of 
view. 
This normal preparation serves as the base of all the others. 
I have taken care, at the end of each formula, to point out the 
proportion in which the normal solution enters into the 
resulting preparation; by this means, practitioners have it in 
their power to vary their prescriptions without departing 
from the proportions indicated in my therapeutical obser- 
vations. 
FORMULAE. 
Normal Solution of Proto-iodide of Iron of Dr 
Dupasquier. 
f&. Iodine, 10 grammes. 
Iron filings, 20 " 
Distilled water, 80 « 
Introduce the whole into a small matrass, which is to be 
placed for eight or ten minutes in water heated to 70° or 80°, 
C, (but not boiling, for this will volatilise a part of the iodine.) 
Shake the mixture several times.* 
*This preparation may be made in the cold, but we then experience a 
little more difficulty in obtaining a perfectly colorless solution, If we ope- 
