54 Fourcroy and Vaigquelin’s ‘Memoir on Human Urine. 
the prefent. It is of much importan¢e to animal phyficlogy 
and the art of healing. 
It appears‘that, befides thefe ten {ubflances, the real and 
conftant materials of human urine, it contains fametimes, 
but rarely and accidentally, fulphat of foda, muriat of pot- 
afh, fulphat of limé, oxalat of lime and of filex : that fome 
of thefe fubftances, and particularly the two latter, are only 
the-rare productions of fome particular and perhaps mor- 
bific difpofitions of urine. It will be of great utility to in- m 
quire into the circumftances which +have an influence on the 
exiflence of thefe’ matters, which are foreign’to the natural 
ftate. f 
XIV. In charaéterifing urine as a liquid very diftin& from _ 
all others, the matter which I have called wrée gives it, above 
all, the property of becoming, by the decompofition which 
it occafions, a liquor very different from what it was when 
it iffued from the bladder, and a fubftance totally new. Fer- 
mented urine is changed in almoft all its matters.’ The view 
of thefe changes, which terminates this Memoir, exhibits, as 
the moft ftriking refult, the production and exiftence in pu- 
trid urine of nine new matters, which do not exift in freth og 
natural urine. Lari 
1. Ammonia in excefs. 
a. The phofphioric acid faturated by this alkali. dé 
3. The phofphat of magnefia converted into ammontacde. 
magnefian phofphat. 
4. The urat of ammonia. 
5- The acetous acid united to ammonia. 
6. The benzoic acid faturated with the fame ammonia, 
+. The muriat of foda become oétacdral. ' 
8. The muriat of ammonia become cubic. 
9. The carbonat of ammonia. 
We may ftill add the precipitation of the albumen and 
gelatinous ‘matter eflected by the ammonia, and which ac- 
companies that of the phofphats; fo that thefe falts, like the 
matter of bone, are fufceptible of giving carbon when heated, 
Such is the general view of the facts contained in this firft 
Memoir,. They prove how many new and important refults 
a plo 
‘ 
