708 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1712. 



Stratum, which is the same with N° 13, was not takenj 9, coal, called bench-coal j 10, coal, less 

 black and shining than the former, called slipper-coal 3 11, coal, more black and shining, called spin- 

 coal ; 12, a coal like cannal-coal, by the miners called stone-coal. These strata of coal have between 

 each of them a bat, of about the thickness of a crown piece j 13, a black substance, called the dun- 

 row-bat j 14, a hard grey iron ore, called the dun-row-iron-stone j 15, a bluish bat, in which the 

 following iron-stone lies, called the white-row j 16, a hard blackish iron ore, lying in small nodules, 

 having between them a white substance, and from thence by the miners called the white-row-grains, 

 or iron-stone; 17> a hard grey iron ore, with some white spots in it, called the mid-row grains; 18, 

 a black fissile substance, called the gublin-batj 19, a hard blackish iron ore, with white spots in it, 

 called the gublin-iron-stone; 20, a bat, in substance much like that of N° 18; 21, a hard grey iron 

 ore, called the cannoc, or cannot-iron-stone ; 22, a bat, somewhat harder than N° 20; 23, a dark, 

 grey, hard iron ore, called the rubble-iron-stone; 24, the table bat, next under the rubble-iron-stone; 

 25, a coarse sort of coal, called the foot-coal; 26, a black, brittle, shining bat; 27, the heathen-coal; 

 28, a substance like a coarse coal, but by the miners called a bat; perhaps because it does not bum 

 well; 29, the bench-coal; 30, a bat under the last, and is as low, viz. 188^ feet, as they generally 

 dig, though there is a coarse coal under this. 



Note, Those substances, which divide the strata of coals and iron ores from each other, are called 

 bats by the miners; they are generally black, consisting of a matter peculiar to themselves, and sore 

 of a texture most like marl; though some of them are fissile^ and others have a substance not unlike 

 coal mixed with them. 



A Table of the Thickness 



of each Stratum, and its Proportion to Water j or 

 Specific Gravity. 



No. of the Thickness of Proportion or Specific 



strata, each stratum, to water. gravity, 



ft. inc. 

 ,4 0. . as 385 to 192. . as 200 to 100 



5 0.. 296 168.. 176 

 24 0. 

 9 0. 



1.. 



2.., 



3... 



4... 



5... 



6.. 



7... 



8... 



8 + . 



9... 

 10... 

 11... 

 12... 

 13... 

 14... 

 15... 



4 0. 

 21 0. 

 75 0. 



5 0. 

 1. 0. 

 3 



0. . 

 0. . 

 0.. 

 0. . 



1.. 

 3.. 



23 

 209 

 583 

 401 

 683 

 223 



"7 

 106 

 147 

 185 

 408 

 204 

 183 



9.. 

 106.. 

 237.. 

 192.. 

 259.. 

 88.. 



5.. 



72 . 

 114.. 

 143.. 

 198.. 



67.. 



72.. 



256 

 197 

 246 

 209 

 243 

 253 



No. of Thickn. of Proportion 

 the each stratum, to water, 

 strata, ft. inc. 



16. .1 3..as325 to 232 



17. .0 2.. 781 244 



18.. 2 0. . 



19.. 9.. 



20. .1 6. . 



21.. 6.. 



22. .1 0. . 



23.. 6.. 



24. .2 0. . 



25. . 1 0. . 



26.. 6 0.. 



27.. 6 0.. 



28.. 1.. 



29. .2 0. . 



30. .0 6. . 



By which it is evident, that the 

 casual, as if mixed by chance. 



140 

 "147 

 129 

 130 

 206 

 303 



254 . . 



gravities of the several strata are in no noanner of order, but purely 



305 

 920 

 192 

 675 

 428 

 828 

 333 

 198 

 238 

 298 

 267 

 314 

 244 



129 . 

 266 . 

 76 . 

 2l6f 

 165 ., 

 231 . 



153 .. 



154 .. 

 141 .. 



236|. , 

 186 . 

 240 . 

 133 . 



or Specific 

 gravity. 



as 334 to 100 

 320 

 236 

 346 

 253 

 313 

 290 

 358 

 218 

 128 

 169 

 126 

 144 

 131 

 183 



END OF VOLUME TWENTY-SEVENTH OP THE ORIGINAL. 



END OF VOLUME FIFTH. 



C. and R. Baldwin, Printers, 

 New Bridge-Street, London. 



