[ i6o ] 



Its hardnefs 6, very brittle. Specific gravity 1,351 by my 

 trials. It flightly cakes. 



240 grains of it left after three hours expofure to heat 12,5 

 grains of reddifh grey afhes, that is equal 5,2 per cent. 



Th e decompofition of the ftandard quantity of nitre required 

 70 grains of this coal. Hence 100 grains of it contain 71,43 of 

 carbon, 23,37 of a mixture of maltha and afphalt, and 5,2 of 

 afhes. 



Newcajlle Coal. 



I HAD none of this kind of coal, but according to Dodlor 

 Watfon's experiment it left on diflillation a coaly refiduum 

 amounting to 58 per cent, and hence contained about 40 of a 

 niixture of afphalt and maltha, in which the former appears to 

 praedominate. Hence it much refembles the Whitehaven coal, 

 but it evidently contains fulphur alfo, which that of Whitehaven 

 feldom does. 



^ Synoptical 



