ON HYDRATED PEROXIDE OF IRON. 
11 
obtained a very perfect result, with a satisfactory economy of 
material. 
Hydrated Peroxide of Iron. 
Jfe. — Sulphuric Acid, (67° Baume,) 8 oz. 16 parts. 
Iron Wire, 8 oz. 16 " 
Nitric Acid, (49° Baume,) 5h oz. 11 " 
Water of Ammonia, q. s. 
Water, 1§ gal. 384 " 
Mix the Sulphuric Acid with the water in a glass vessel. Add 
the Iron, and, after the effervescence has ceased, filter. Add 
the Nitric Acid in divided portions, and apply heat so long as 
orange colored fumes are given off. To the heated solution, 
pour in the Water of Ammonia until a decided excess has been 
added, then wash the precipitate by decantation, until the 
washings give no precipitate with Nitrate of Baryta. The 
water is then to be drawn off until just enough remains to give 
the consistence of thick cream. It should be introduced into 
bottles of convenient size for use. 
Bottles containing half a pint are recommended as conve- 
nient; and the annexed direction, it is thought, will enable 
the most ignorant to use it until medical advice can be ob- 
tained. " This antidote must be administered as soon as 
possible after the discovery that arsenic has been taken, and 
as it produces no bad effects itself, should be given every Jive 
or ten minutes, until entire relief is obtained* The dose 
for a grown person is a table -spoonful; for children, a dessert 
spoonful. The bottle must be well shaken before each 
dose." 
The following remarks on the preparation are from the 
paper of Drs. Bunsen and Berthold. After giving direc- 
tions for the preparation, by means of sulphuric acid, iron, 
* It is considered better to administer it thus in doses until relief 
is obtained, than to endeavor to give four, eight, or twelve times the 
amount of arsenic taken, which, for obvious reasons, can seldom be 
known. 
