2 24 On the A7ttmal Calculus. 
Plenty to a VelTel already incmftcd with ir, 
than to a clean Veflel, viz. becaufe the fixe 
Taitarine Particles atcra6b more ftrongly than 
thofe of the Sides of the Veffel ; An uncom- 
fortable Obfervation for thofe to refled on, 
who have a Calculus once begun in them. 
14. He found that even diftilled Urine de- 
pofited a Tartar ; the Rcafon he gives why 
Urine long detained in the Bladder does not 
depofite its Tartar to the Sides of the Bladder, 
as in a Pot, is becaufe in the Bladder it is nor 
fo foon difpofed to putrify, and that Tartar 
will not adhere fo well to the Bladder as to 
a Pot. 
ly. Helmont finding the Ignorance and In- 
cogitancy of others on this Subjed, fays, he 
gave away as many Books, as were worth two 
hundred Pieces of Gold, and wiflied he had 
burnt them ; for Books gave him not the leafl: 
Light. A mortifying but ftrong and lively 
Infiance of the little Progrefs we muft ever 
hope to make in our Rcfearches into the Na- 
ture of Things, without firfi firiking out what 
Light we can, by variety of proper Experi. 
ments. 
16. The Urine that is made at the great- 
efi Diftance from drinking, is obferved to be 
a moft 
