faptero gir] 
NII. Examination of the Experiments and new Obfervations 
» of G. Pearson, M.D. on Human Urinary Concretions 5 
and a Comparifon of the-Refults obtained by that Chemift 
with thofe of SCHEELE, BERGMAN, and fome of the 
| French ‘Chemifis. By M. Fourcrox. From Annales 
de Chimie, Vol. XXV II. 
[Concluded from page 272. ] 
My view in commencing my labours on this fubjeét 
was not only to eftablifh the facts announced by Scheele, 
but alfo to purfue much farther the examination of urinary 
calculi; and to add to it that of all the animal concretions 
T-could procure. , This plan will be found partly executed 
in the details I have publifhed. 1. On the inteftinal cal- 
culus of the horfe, which I found to be a triple falt, formed 
of 2 parts of phofphat.of magnefia and 1 part of the phof- 
phat. of ammonia. 2. On a renal calculus of the fame 
animal, in which I difcovered 3 parts of the carbonat of 
lime and r part of the phofphat of lime, without any matter 
analogous to that in the human calculus. 3. On a calculus 
of a cat, which gave me 3 parts of the carbonat of lime and 
1 part, of the phofphat of lime.,.4. On the tartar of the 
teeth, which I found to,be pure phofphat of lime. 5,.On 
the calculus of the human reins, the nature of which I 
determined to be perfectly fimilar to that of the calculus of 
_the bladder. In the examination of, feveral concretions, 
different:from. thofe gf the urinary calculus, Iwas. prior, to 
Dr. Pearfon by more than ten years, and my ljabours, had 
‘been publifhed five years when -he communicated his to the 
- Royal Society of London; yet he has not quoted my. work, 
_though he has done nothing but repeated and confirmed my 
experiments. . 
With regard to the human urinary calculus, I had ex- 
amined a fufficient number to be able to trace out. the 
general characters which I thought it neceflary.to add to 
thofe 
