21. YORKSHIRE. 337 



I mention this circumftance, as the plot 

 of ground in which this (jiiarry is dug was 

 bought, it feems, at an extravagant price for 

 the purpofe of lime-burning ; but the lime, 

 // is faid, proving of an inferior quality, a 

 principal part of the money will be funk. 

 This fhews the great ufe of analyfis in afcer- 

 taining, without hazard, a knowledge of the 

 qualities of limeflones *. 



One hundred grains of Wold-chalk, ta- 

 ken from a lime-quarry near Driffield, yield 

 forty-four grains of air ; three and a half 

 grains of a foft mucilaginous rcfiduum ; and 

 ninety-fix and a half grains of calcareous 

 matter -f. 



2. Burning. In giving the detail of this 

 operation, the following fubdivifions will be 

 requifite : 

 Vol. I. Z I. Building 



* 111 this cafe, however, if the f^»eclmen I happened 

 to take was a fair one, the bad quality of the lim;: cannot 

 be altogether owing to the ftane ; which, by this ana- 

 lyfis, is far from being a bad one, though inferior to 

 that of the preceding experiment. 



f In thefe experiments the quantity of calcareous 

 MATTER is inferred from the quantity of residuum, 

 no more of it being precipitated thafi a fufticiencv to 

 fliew its colour^ which in every cafe was oifnowy txihite- 

 nefs; a principal evidence of its being a pure calc.ireous 

 earth. The quantity of air and the quantity of re- 

 »I»UUM were in each experiment elofely attended to. 



