ARSENIOUS ACID AND UNG CENTUM HYDliARGYRI. 171 
By copious venesection, a brisk purge, the application of a 
sheep-skin to the loins, and, subsequently, the employment of 
medicinal counter-irritation over that region, conjointly with the 
administration of fever medicine and occasional doses of sether. 
nit. opii, which latter I believe to be very useful in these cases if 
judiciously given, I was enabled a second time to release my pa- 
tient from the invasion of another form of disease which Nature 
has imposed as a penalty upon the domestication of our equine 
slaves. 
I would just observe, that the laryngitic affection was doubt- 
less ushered in by the pony having been incautiously turned out 
of a warm stable to a damp cold pasture ; and, I would add, rather 
abruptly, too, being compelled by the villany of some dastardly 
incendiary. An unusual state of weather occurring in the course of 
this case, perhaps, caused a great infiltration of lymph along the 
lumbar portion of the back under the latter malady, which I ap- 
prehend was referrible to a favourable extension of the phrenitic 
inflammation, as it certainly appeared to have moderated the in- 
tensity of the attack upon those organs. 
THE EMPLOYMENT OF ARSENIOUS ACID AND 
UNGUENTUM HYDRARGYR1. 
By Mr. Cox, Leek . 
The cases recently recorded in your Journal of poisoning by 
arsenic being applied to the skin bring to my recollection what 
occurred upwards of fifteen years ago. 
A farmer had five cows (his all) infested with lice. Application 
was made to a person famous for destroying this kind of vermin. 
The doctor prescribed a solution of arsenious acid, — the hair of the 
animals to be wetted with it : but the farmer exceeded his instructions, 
and gave each of them a good rubbing ; the consequence of which was, 
that two died on the following day, and two others on the second 
day from the application, exhibiting the usual symptoms before 
death, and in the post-mortem appearances, of poisoning, the same 
as when the mineral is given internally. They were clothed, and 
great care was taken that they did not lick themselves, &c. 
The cow which survived narrowly escaped with life. Extensive 
sloughing took place on various parts of the body, and she became 
a mere skeleton. 
