79e-] 
doétor’s, would be a {trong inducement 
to it, were it conducted by proper per- 
-fons.—_May the God of all grace, who 





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Phenomenon in L4ineralogy. 


20 
nath always preferved thefe our poor 
churches in their low eftate, mercifully 
fhine on this plan of public utility 1” 
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Stratum of Rubble. 
Horizontal Stratum of Freeftone. 
- Lhe Diagonal Stratum. 
To the. Editor of the Monthly Magazine. 
STR, 
SUBMIT to your judgment the pro- 
. priety of inferting, in your very ufeful 
Publication, fome particulars of a won- 
derfui phenomenon in mineralogy, which 
has lately come under my obfervatione The 
annexed is a drawing of the fingulardirec- 
tions of the firata of a kind of treeftone, in 
@ quarry, at Comb-down, near Bath. The 
uppermoft ftratum is about 34 yds. thick, 
compofed of rubble, with about fix inches 
of foil on the furface. The ftratum imme- 
diately below, confifts of ftone, of double 
the thicknefs with the firft, in beds, or 
layers, of from three to nine inches, and 
in their dire€tion, perfectly horizontal. 
' The next ftratum (which already in- 
eludes a depth of more than 5 yards is a 
freeftone, fuperior tothe former in the 

firmnefs of its compofition, and the thick- 
nefs of its beds, which are from 8 to rg 
inches. But what remarkably diftin- 
guithes this ftratum from thofe immes 
diately above it, is the fingular direétion 
of its beds or layers, which form, in their 
declination (from- NE. to SW.) an angle 
of 25) degrees with the horizon. This 
fingular phenomenon is not confined to 
the fituation I have now defcribed, but 
is exhibited with every feature of refem- 
blance in the adjacent quarries. 
Quere—The probable cauje of fo won- 
derful a variation m the direétion of 
{trata, contiguous to each other, and, in 
other refpegis, pofieffing fo general an 
uniformity + I remain, fir, © 
Your obedient fervant, 
J. H. Mecerince. 
StokeLoufe, near Bradford, March 17,1796. 
For 
