OBSERVATIONS ON SOUNDNESS. 
203 
of iron and two or three ounces of sulphate of magnesia 
once or twice a day; for sheep a fourth of the quantity will 
suffice. It is desirable, after two or three days, to withhold 
the sulphate of magnesia for a time, and recur to it if 
necessary, the object being to avoid its active purgative 
effects, while we take advantage of its influence as a saline. 
It will happen during the progress of the malady, chronic 
diarrhoea in any or all of its stages, that many phases present 
themselves, requiring modifications in the treatment to meet 
the exigencies of the moment. However varied may be the 
practice under different circumstances, the principles upon 
which it is based are easily recognised, and will never permit 
variety to degenerate into opposition. 
(To he continued^ 
OBSERVATIONS ON “ SOUNDNESS.^^ 
By R. H. Dyer, M.R.C.V.S., Waterford. 
(Continued from p, 140.) 
Having in my last paper made a few remarks upon nasal 
gleet, and spoken of that system of glands termed the salivary, 
I will now^ attempt to describe the affections which more espe¬ 
cially interfere with the functions of these glands, such as stran- 
gles,regular and irregular; fistulous parotid duct,and glanders. 
But before I proceed to consider these diseases, it may be 
profitable to get a glimpse of the anatomical and physio¬ 
logical bearing of the parts themselves. There are three pairs 
of salivary glands, or three single glands on either side, viz., 
the parotid, submaxillary, and sublingual. The parotid 
glands are the largest, and are placed near the ears; in fact, 
immediately below the root of the ear is found the superior 
part of the gland. It lies in the hollow^ space at the upper 
and back part of the head, and is bounded by the branch of 
the lower jaw before and the petrous portion of the temporal 
bone behind, extending as low dowm as the angle of the jaw. 
It is enveloped in cellular membrane, and is made up of 
many lobes. These lobes are connected together by means 
of a dense cellular structure. Each lobe has a distinct set 
of secretory vessels; tubuli arise from them, which at length 
form one mairr branch, the excretory duct. The parotid duct 
emerges from the inferior part of the gland, passes along the 
