i6 DISTRICT. 



fabfifls between limefhone and the rubble, 

 with which it is frequently covered *. 



Intermixed with the foil, and often united 

 with fragments of flate rock, is found, in 

 blocks and fragments of various lizes, a 

 fpecies of cryilal, or quartz — provincially 

 "WHiTTAKER;" which, in colour, is 

 moftly white, fometimes tinged with red, 

 or rufl; colour. 



Obferving, in feveral fpecimens of this 

 fofiil, fome refemblance of gypfum ; and 

 alfo remarking the fertilizing quality of the 

 waters which filter through thefe flatey 

 rocks : and moreover finding them infen- 

 fible to the m.arine acid, ufed as a teil ; 

 I was led to the idea, that they were of a 

 gypfeous nature. 



To endeavour to afcertainthe component 

 parts of the slate rock, of which the 

 hills of the cultivated parts of the Diftridt 

 may be faid to be formed, I fubje<fled diffe- 

 rent fpecimens-f of it to an extended courfe 



of 



* See York Econ*. Vcl. I. page 336. 

 -j- Thcfc fpccimens were the ordinary building 

 STONE of Buckland Place, aiid the covering slate of 



a quarry 



