Obfervations on the Flints of Chalk-beds. 3.03 
alkali, the two other ingredients fubfided on account 
of their infolubility. What this third material 
might be, I never inveltigated. 
I am, dear Sir, 
Your’s with great regard, 
THOMAS BEDDOES. 
Some Ozservations on the Furnts of Cxax-zeps, 
in a Letter from Tuomas Beppors, M. D. Phy- 
fician, at Briftol Hot Weils, to Mr. Tuomas 
Henry, F.R. S, &c. 
READ, NOVEMBER 29. 1793, 
DEAR SIR, 
PNG my refidence at Oxford, I examined 
with great attention fome chalk quarries, or 
pits, in that part of England, efpecially near Henley 
upon Thames. I hoped, or rather I withed to 
meet with appearances, indicating the manner in 
which the flints thefe beds contain have been formed 
and diftributed. But I was totally unable to frame 
any hypothefis, fuch as would comprehend all the 
phenomena, 
