ON DIAPHORETIC ANTIMONY. 
299 
These data are sufficient to establish the true constitution of 
the mixture. 
We have practised this anatytic method upon several speci- 
mens of diaphoretic antimony, obtained by different opera- 
tions, where we have taken the greatest precaution to have 
the products identical: viz., equal proportions of the ingre- 
dients, the same vessel, the same continued heat, and in spite 
of these precautions we have obtained variable proportions of 
the different oxides. 
The following table indicates to a hundreth nearly the re- 
spective quantities of oxides, acid, and water, which we have 
found contained in four equal weights of diaphoretic antimony 
prepared according to the Codex of 1818: 
Oxide of Antimony 2.31 1.79 3.22 9.85 
Antimonious Acid 8.31 9.36 7.39 13.21 
Antimonic Acid 79.14 79.60 98.44 66.67 
Water 10.24 9 25 10.95 10.27 
Thus it is proved by us, that by following the Codex of 1818 
to prepare diaphoretic antimony, it is almost impossible to ob- 
tain a product constantly identical; it is always a mixture, in 
variable proportions, of hypo-antimonite, of antimonite, and 
of bi-antimoniate of potassa, and of water. A few degrees of 
heat are influential in varying the relative proportions of these 
three compounds, which we have constantly found. We 
ought to state, however, that by maintaining the heat at the 
point of redness for an hour and a half, we have ascertained 
that the hypo-antimonite had completely disappeared. 
Let us examine the product obtained by following exactly 
the directions given by the new Codex. 
M. Guibourt, professor in the school of Pharmacy of Paris, 
has devoted himself to researches upon this subject; the re- 
sults to which we have come, are nearly those published by 
that skilful observer, but they differ from them in some re- 
spects; thus, according to M. Guibourt, diaphoretic antimony, 
prepared according to the new Codex, is composed of 
