XI. A Befcription of the federal Strata of Earth 5 Stone, 
Coal , &c. found in a Coal-Tit at the Weft End of 
Dudley in Staffordfhire : By Mr. Fettiplacc 
Bellers, F. R. S. To which is added 5 a Table of 
the Specific 4 Gravity of each Stratum : By Mr 
Fr. Hauksbee, F. (^. S. Communicated by Vr * 
Hans Sloane, (^. S. Seer. 
I. \ Yellowi(h Clay, which lyes immediately under 
the Turf. 
II. A Blewilh Clay. 
III. A Blewilh hard Clay 5 the Miners call it Chrnch. 
This is one of the certain Signs of Coal. It has in it 
Mineral Plants. 
IV. A Blewilh foft Clay. 
V. A fine-grained Gray Stone : It lyes nest the for- 
mer, and is found in fome Pits only. 
VI. A Clay almoft like the Firft, only whiter. 
VII. A hard Gray Rock y with fomething like the 
Impreffions of Vegetables, but none diftindt. 
VIII. A Blew Chinch , like Numb. 3. with Mineral 
Plants in it. 
VIII. -p. This Stratum (which is the fame with Numb* 
13.) was not taken. 
IX. Coal,., called Bench-Coal. 
X. Coal, lefs black and ihining than the former, cab- 
led Slipper-Coal. 
XI- Coal, more black and Ihining, called Spin* Coal. 
XU. A Coal like Cannal-Coal , by the Miners called: 
Stone Coal. Thefe Strata of Coal have between each? 
a q£ 
