PROPOSED EXAMINATION OF VETERINARY PRACTITIONERS. 467 
Is/ Portion. The addition of ammonio-nitrate of silver, which 
produces a yellow precipitate. 
Qncl Portion. The addition of ammonio-sulphate of copper, 
which produces a green precipitate. 
3rd Portion. The addition of hydrosulphuric acid and a drop 
of hydrochloric acid, which produces a yellow precipitate. 
4 th Portion . This should be examined by Marsh’s test, the 
details of which Mr. Harrison is no doubt familiar with. 
Another remarkably good process is to cut up the parts 
to be examined into very small pieces, to cover them with the 
strongest hydrochloric acid, and to allow the mixture thus 
formed to stand in a warm place for twenty-four hours. At 
the end of this time the mixture is to be placed in a retort 
and distilled to dryness. The liquid which condenses in the 
receiver will contain arsenic if that body existed in the tissues 
under examination, the presence of which may be demon¬ 
strated by submitting the distilled liquid to Marsh’s test. 
The two processes just described are those upon which the 
greatest reliance is now placed, and they are both valuable, 
especially Reinsch’s, from their enabling one to apply the 
tests for arsenic to liquids free from admixture with organic 
matter , a circumstance to which chemists attach the greatest 
importance, and to which Mr. Harrison appears to attach 
little or no value. I am, yours faithfully. 
To the Editors of ‘ The Veterinarian .’ 
"PROPOSED EXAMINATION OF VETERINARY 
PRACTITIONERS.” 
By "One of Them.” 
Gentlemen, —As there is great discussion now going 
on, on the point of distinction between qualified and unqua¬ 
lified practitioners, I trust, with many others, that a bye-law 
will be passed to enable unqualified practitioners to go up 
for examination. There are a great many useful and intelli¬ 
gent men of this class, who could neither spare time nor money 
to attend the required-lectures at the College. Men who are 
so much respected by their employers that these would not 
even think of rejecting their services because they were not 
in possession of a diploma; and men who would gladly 
accept the opportunity of being practically examined, and 
who, if they passed the ordeal, would be at once distinguished 
from the mere pretender. 
I trust, therefore, that such a law will be put in force, that 
these men may have a chance of having their capabilities 
tested. I am, gentlemen, 
"One of Them.” 
