400 
CHOLERA AMONGST CATTLE. 
ministered ; he urged that the conviction which a multitude 
of small experiences wrought in the mind of a practitioner 
could with difficulty be illustrated by solitary instances of so 
complicated a character as many of the diseases which might 
be classed under the second head. In the third head the 
author explained his view« with regard to the action of iodide 
of potassium in the case of the various affections resulting 
from metallic poisoning. Cases of lead-poisoning were 
brought forward, and a well-marked case of mercurial poison- 
ing was also quoted, in illustration of the value of the iodide 
in such cases. Dr. Sieveking adverted to the importance of 
a correct diagnosis in cases of lead-poisoning; as symptoms, 
which otherwise might induce a most unfavorable prognosis, 
would, when regarded as the result of saturnine intoxication, 
justify a much more favorable view. The difficulties attend- 
ing the detection of lead in the urine, where it was manifestly 
being eliminated from the system, were adverted to, and it 
'was suggested that probably at times some, if not all, the lead 
was evacuated by the intestinal canal. Dr. Sieveking con- 
cluded by observing, that he had by no means alluded to all 
the various forms of disease which called for the exhibition of 
iodide of potassium, but that he had merely desired to submit 
to the consideration of the Society some of the opinions 
which practical experience had induced him to form relative 
to the drug, and to elicit from the stores of observation 
of the members further illustrations in regard to its uses and 
effects .” — Medical Times and Gazette . 
CHOLERA AMONGST CATTLE. 
Sir, — I beg to call your attention, and that of the authori- 
ties, through your journal, to a virulent attack of cholera 
amongst pigs and cattle in my neighbourhood. Having 
heard that a number of pigs belonging to a gentleman here 
had died, and that the cause of death was unknown, I went 
and saw one which had been taken ill a short time previous. 
It was lying on its side in a state of collapse, eyes dull, ears 
hanging back, vagina hanging out, pale and flabby. On 
being disturbed, it uttered a peculiar, low, wailing cry. The 
belly was of a beautiful pink colour, shaded with blue ; on 
some parts of the body the blue colour approached to a black. 
On turning it over, the side which was lying on the ground 
was of its natural colour (white), showing, I think, that ex- 
posure to the air had something to do with the change of 
colour. At intervals it was much cramped, and the soft 
