Chemical Science. 163 



Glasgow coal-beds, or the lowest of those now wrought. This 

 coal is the only kind employed at Glasgow, for making coke, and 

 it is also solely used for the smelting of iron. 3. Cherry coal or 

 soft coal ; this kind constitutes the greatest part of the four up- 

 permost of the Glasgow beds, especially the third and fourth 

 beds. The Staffordshire coal, too, appears to be of the same 

 kind. 4. Cannel coal. 



The earthy part was ascertained by burning a certain portion of 

 each coal ; the other elements were ascertained by the products 

 given, when a portion of the coal was heated with the peroxide 

 of copper. The results are that caking coal is composed of 



33 atoms carbon. . . 



11 hydrogen, 



3 azcte . . . 



1.5 ....oxygen .. 



32.875 100. 



So that the weight of an integrant particle of caking coal 

 cannot be less than 32.875, and it must be either that number, 

 or a multiple of it. 



Splint coal contains, 



28 atoms carbon 21 75. 



14 hydrogen .. 1.75 6.25 



1 azote 1.75 .... 6.25 



3^ ....oxygen .... 3.5 .... 12.5. 



28. 100. 



Cherry Coal gave, 



34 atoms carbon 25.5 .... 74.45 



34 hydrogen .. 4.25 12.4 



2 azote 3.5 10.22 



1 o.\ygen .... 1 2.93 



34.25 100.00 



^ ... — - — . — ' — — — — ■ — ^.— ^^ 



* Erronpoiisly printed in tlic annals, 2.25. 

 f LiTDiK-ousiy priutoil in (lie annals, ,')..')8. 

 M 2 



