182 STEVENSON— INTERRELATIONS OF THE FOSSIL FUELS. 



the bed. The ash varies from about 2 to 5 per cent. Hantken'^* 

 gives three analyses, which are equally illustrative; one is of coal 

 from fideleny and the other two from near Brennberg. 



These are all used as fuel; at fideleny, the ash varies from 15 to 21 

 per cent, and the water from 21 to 61 per cent., so that the fuel is 

 of decidedly poor quality ; but at Brennberg, the water does not 

 exceed 18 per cent, and the highest ash is 3.45. These Miocene 

 deposits are confined to very small areas. 



Oligocene Coals. — These are of great importance in Prussia and 

 in Hungary. Hantken-^^ has given proximate analyses of coals from 

 the Zsil valley and from two parts of one mine near Gran : 



Ultimate analyses from two localities in the Gran area, including 

 the mine. already referred to, have been given by Hantken and four 

 others were published by Nendtvich : 



I. Szt. Ivan 



II. Gran . . . 



III. Gran . . 



IV. Tokodt 



V. Sarisap . 



VI. Csolnok 



VII. Zsemli 



C. 



64.92 



69.30 



68.58 



67.495 



67.85 



71.55 



71.89 



O and N. 



30.10 

 27.00 

 26.75 

 27.80 

 27.22 

 23.25 

 23-31 



Volatile 

 in Pure Coal. 



27-45 

 51.82 

 31-30 

 38.77 

 47.44 

 40.45 



The two coals from different parts of the mine at Gran have practi- 

 cally the same ultimate composition, yet in the pure coal there is a 

 difference of 23 per cent, in the volatile. The contrasts are not 



254 M. Hantken, op. cit., pp. 315-325. 



255 M. Hantken, pp. 247, 259, 260, 262, 280, 286, 289; C. M. Nendtvich, p. 32. 



