340 MANURES. iu 



kiln ; for unlefs the proportion of coals be 

 unneceffarily large, the outer fhell only is 

 burnt to lime, the core remaining a lump of 

 unburnt ftone. 



3. Coals. The morelands for the laft fifty 

 years, have furniflied the north-fide of the 

 Vale with coals for lime-burning, and for 

 an inferior fpecies of fuel. The feam of this 

 co^l is thin, and the quality in general very 

 ordinary. 



Before the difcovery of thefe coals, lime 

 was burnt with furze and other brulhwood 5 

 but notwithllanding the morelands are now 

 nearly exhaufied of coals (unlefs fome frefh 

 difcovery fhould be made), the Diftrid is re- 

 lieved from the apprchenfion of returning 

 92:ain to its ancient mode of burning lime. 

 The Dcrvvent, beiidcs an ample fupply of 

 coals for fuel, brings an inferior kind (both 

 of them raifcd in Wefl-Yorkfnire j for the 

 purpofe of lime-burning. The eaflcrn end 

 of the Vale is equally fortunate in this rc- 

 fpcdl, by having the port of Scarborough in 

 its neighbourhood. 



The prcportiofi of coals and ftoncs varies 

 with the quality of the coals, and likewife, 



but 



