258 
ATTACK OF LAMINITIS. 
minute molecular bodies were present in rows ; of what 
nature I could not determine. The tests for blood and bile 
gave no reaction beyond the indication of albumen. 
The presence of pus in the urine is detected only by the 
microscope, under the field of which instrument the peculiar 
granular corpuscles are at once seen with their distinctive 
characters. Their existence would of course indicate suppura- 
tion in some part of the urinary passages ; but other symp- 
toms are necessary to lead us to the precise seat of the disease. 
As it respects bile, or any of its elements ; I have not yet met 
with a case. Its presence would seem to be easily discovered 
by simple tests, and we should be justified in suspecting it in 
any long- continued case of liver disease. 
Dr. Golding Bird suggests two easy methods of ascertain- 
ing the admixture of this fluid, or its colouring matter. 
1. “ Pour on a white plate a small quantity of the suspected 
fluid, so as to form a thin layer ; a drop or two of nitric acid 
added will produce a play of colours in which pink and green 
predominate, if bile is present.” 
2. “ Add to a little of the suspected fluid on a plate a small 
quantity of strong sulphuric acid, when the mixture becomes 
hot, a drop of a saturated solution of sugar will cause a fine 
purple colour in the event of bile existing.” 
AN ATTACK OF LAMINITIS FOLLOWING THE 
EXHIBITION OF ACTIVE PURGATIVE AGENTS. 
By B. Cartledge, M.R.C.V.S., Sheffield. 
On the morning of the first of the present month, my 
attendance was requested on a small pony, six years old, 
some distance from this town, but owing to other engage- 
ments, I was unable to attend until late in the afternoon, and 
to save me some trouble in carrying a parcel of medicines, my 
assistant packed up what he thought I might require, and, 
giving it to the messenger, desired him to keep it untouched 
until my arrival. 
To my inquiries, answers to this effect were obtained : 
The day previous the pony had been ridden by his owner 
about twenty miles, the latter part of the journey being per- 
formed with much difficulty, the rider having to dismount 
and lead the pony. Arriving at home, food was rejected, 
and otherwise the animal appeared very unwell. A farrier in 
a neighbouring village was sent for, and who was present on 
