254 
URINARY DEPOSITS. 
you may excite in him any internal disease you can ; or you 
may irritate and annoy the mucous membrane of the bowels 
to whatever extent you like, without any fear whatever of 
laminitis or metastasis occurring. But, on the other hand, 
if that state or condition of the system does exist, depend 
upon it it requires only a very little help, and a fractional 
part of any of the above excitants would become amply 
sufficient to develop it. Moreover, I believe this state of the 
system is dependent upon many causes, and may exist to a 
greater or less extent unobserved for weeks or months, lurk- 
ing, as it were, in a latent form, "waiting only for some 
fostering or exciting circumstance to rouse it into activity. 
This state may be temporary, or, for aught I know, it is 
hereditary. I am not in a position to prove it, nor do I 
think veterinary science is as yet sufficiently advanced to 
pronounce definitely upon it ; but if such is a fact, does it 
not behove us, as practical men, to inquire into it, and to ask 
ourselves what is the precise nature of this state ? what are 
the causes of it? what are its premonitory indications? and 
what means, if any, can be employed to correct it in time, 
and by so doing circumvent such baneful consequences ? 
These inquiries shall form the subject of consideration for 
my next paper. 
ON URINARY DEPOSITS. 
By George T. Brown, Professor of Veterinary Medicine, 
Royal Agricultural College, Cirencester. 
It is a somewhat remarkable fact, that the above subject, 
which has awakened so much attention in human medicine, 
should have remained almost altogether unnoticed by the 
veterinary practitioner. Without staying to inquire into the 
causes of this, we may take the liberty of assuming the 
matter to be equally worthy of the investigation of both ; 
and, with the view of clearing away some preliminary diffi- 
culties, we propose to consider the general character of the 
healthy secretion designated urine, premising that for the 
practitioner who desires to avail himself of the hints we pre- 
sume to offer, a few tests and some apparatus are necessary ; 
to wit: — watch-glasses, test-tubes, spirit-lamp, test-papers, 
namely, litmus and turmeric ; nitric, hydrochloric, acetic, and 
sulphuric acids ; chloride of barium, oxalate of ammonia, 
acetate of potash, liquor potassae, sesquichloride of iron ; an 
