AN ANTIDOTE FOR ARSENIC. 
119 
drated peroxide of iron obtained from the decomposition of 
four parts of liquid perchloride of iron, three parts of acetic 
acid of density 1.06, and sufficient water to make up 16 
parts. 
This liquid, which is a solution of peracetate of iron with 
excess of base, precipitates arsenious and arsenic acid from 
all their solutions, either free, or combined with any base ; 
500 grains of it are sufficient to decompose 1880 grains of 
Fowler's solution. 
This result demonstrates that liquid peracetate of iron 
merits preference in cases of poisoning by arsenical com- 
pounds. It should be remembered that its power is more 
rapid in proportion as it is more diluted withj water ; besides 
which, large dilution prevents all irritating action of the 
acetic acid set free. — Journ. de Ch. Med., November 1844, 
as inserted in the Philosophical Magazine. 
[The mode of preparing the above compound is not very 
clearly stated, for the strength of the liquid perchloride of 
iron is not given. It may be presumed that peracetate of 
iron mixed with peroxide is to be employed ; the degree of 
excess of the latter is of little consequence, and the strength 
of the peracetate is limited by the employment of four parts 
of acetic acid of 1-06 made up to 16 parts with water, and 
this, it appears, is to be largely diluted before exhibition. — 
Ed. Phil Mag.-] Ibid. 
