DISEASES OF THE RESPIRATORY ORGANS. 
511 
1st. That absorbed lead probably existed in the coats of the 
stomach and intestines. It is impossible to speak with cer¬ 
tainty on this point, as the lead found in these organs may, 
in spite of their having been washed in distilled water, have 
consisted of minute fragments of metal, or its incrusting 
carbonate, adhering to their coats. 
2nd. That lead passed from the alimentary canal into the 
circulation. This was proved by the metal being found in 
the liver and kidney. 
3rd. That inasmuch as the lead found in the stomachs of 
the cows, referred to in your letter, had been lying in those 
organs, and there exposed to the action of alkaline and 
acid fluids, during a period of between at least six and seven 
months, it appears to me that the lead must have all that 
time been undergoing gradual but constant solution, that is, 
conversion into a fit state for absorption. 
4th. That it seems to me probable the death of the cows, 
in whose stomachs the lead was found, was occasioned by 
the absorption of that metal into their systems, especially as 
they all appear to have exhibited the same symptoms prior 
to dissolution. 
5th. That if the medical, chemical, and general evidence, 
which we at present possess, will not enable us to say that 
lead did actually and positively occasion the death of the 
cows, we are, nevertheless, in possession of sufficient facts, 
and of such a character, as to warrant us in considering that 
it would be exceedingly unwise to permit animals to be kept 
in fields adjoining rifle-butts, unless precautions are taken to 
prevent the spray from the targets being scattered about in 
the manner it appears to have been hitherto. 
I am, Sir, 
Your obedient Servant, 
Richard Y. Tuson, F.C.S., 
Professor of Chemistry to the Royal Feterinary College. 
ON SOME OF THE DISEASES OF THE RESPI¬ 
RATORY ORGANS OF THE HORSE AND 
OTHER ANIMALS. 
By Professor Brown, M.R.C.V.S., London. 
(Continued from go. 389.) 
After some general reflections upon the difficulty and im¬ 
portance of distinguishing between the different kinds of 
