[ 55 ° ] 
the center on the flat fide j in moft of them two, or 
fometimes four holes, near the edge, but they do not 
penetrate quite through the piece. They are fome- 
times found at the top of the cliffs, between two 
flones fet on edge, and covered with a third, mingled 
with human bones. Sometimes they are found by 
themfelves, but always in made ground. The com- 
mon people call them coal money. I think it can 
fcarce be doubted, that they are Britifh antiquities. 
To thefe, I fhall add Dr. Hoffman’s * account of a 
flratum of the fame kind in Pruflia, in the neigh- 
bourhood of Fifchaufen, &c. where they dig. for 
amber. “ The upper flratum is fand, under it a 
“ bed of clay, and then a woody flratum, eonfifting 
“ of a fubftance like old wood, but inflammable j 
« under this was a vitriolic mineral ; and, laftly, a 
“ bed of land, in which a great quantity of amber was 
“ found.” There is a remarkable refemblance be- 
tween the order of thefe ftrata, and thole at Bovey ; 
and though no amber has been difcovered at the latter 
place, yet it would feem, as if there were fome con- 
nection between that and thefe bituminous flrata ; for 
it ^remarkable, that Theophraftus f , fpeaking of an 
eairthy inflammable fubftance in Liguria ol tnis kind, 
adds, that amber is found there. 
The refemblance likewife, which the flrata of 
Munden and Allendorf bear to thofe of Bovey, is 
remarkable, the foil in which they lie eonfifting of 
clays, boles, and fand. This is fo much the cale at 
Bovey, that they have large beds of a very fine pipe 
* Obfervationes Phyfico-chemicalcs, lib. ii. obf. 23. p. 199* 
i De Lapidibus, p. 4. 
clay 
