On the Animal Calculus, 241 
Waters, which arife at North Homes and in 
Old Park, which fupply the Dean and Pre- 
bendaries znd other Inhabitants of Canterbury. 
Thefe Waters come from gravelly Hills, and 
are conveyed thence in leaden Pipes, one from 
Comb Hill in Surrey, and the other from a 
like Hill about a Quarter of a Mile’s Diflance 
from Canterbury. So that Water feems not to 
contraft any tartarine Quality from Gravel. 
And it is accordingly remarkable, that I can- 
not find upon tryal, any tartarine Qiiality in 
Gravel Stones or Flinty either by Fire or Fer- 
mentation. 
15, Hippocrates condemns Water chat is car« 
ried far in Pipes of Lead, yet three of chefe 
abovementioned \¥aters are carried a confidera- 
ble way in leaden Pipes, that of Hampton- 
Court y about two Miles, and yet none of them 
have any incrufling Quality. 
14. The Comb Water is obferved to be fof- 
tcr, and to wafli Linen clean with a lefs Quan- 
tity of Soap than either Thames Water, or 
the Water of the River, which runs a-crofs 
HounJIow Heath to Hampton Court. Whence 
it feems not improbable, that the Hardnefs of 
many Waters, and their curdling and coa- 
gulating of Soap may be in a good Meafure 
R ov/ing 
