Of Salts in Mineral Waters . 263 
Planes : though both Ends are feldom to be 
found unbroken,—Of this Salt fome is feeii 
with five Sides, and all the other Varieties 
may be found in it, which are fhewn Fig . 
VIII. 1. 2. 3. 4. 5. 6. 7. 
Unripe or imperfect Vitriol is a white 
Salt, whofe Cryftals are Cubic Rhom- 
boides: as Fig . IX. 
The Cryflals of our Inland Salt-fprings 9 
not yet arrived at Maturity and Perfedtionf 
are formed like Fig. X. 
The Particles of each of thefe particular 
Salts 9 either in falling one upon another, or 
uniting on one common Bafe, form them* 
felves into Maffes, which are invariable, and 
always of the fame regular Figure : but it is 
belt to examine them in the fmallefl Maffes, 
their Shape being there moft perfect and 
diftindt. 
CHAP. L. 
Mifcellaneous Discoveries and' 
Observations. 
I T has been urged by fome, in Behalf of 
ipontansous Generation, that Worms are 
found in the human Bowels, of a Figure 
feen no where elfe ; and therefore that they 
muff be generated there, fpontaneoufly, by 
the Slime and Heat of the Inteftines: for if 
they proceed from Parents of their own Kind 
without 
