BY A. B. WALKOM. 



129 



Analyses of some Coals from the Lower Split of the Main Greta 



Seam. 



Hygroscopic moisture 

 Volatile hydrocarbons 

 Fixed carbon 

 Ash 



Sulohur 

 Sp.Gr. 

 Coke 

 Lbs. 



by lib. coal 



VI. 



1-58 

 42 72 

 50 30 



5 40 



873 

 1-272 

 55-70 



13 5 



i. Rothbury Colleries* (No. 1 sample). Coke fairly swollen, firm and 

 lustrous. Ash, grey in colour; semigranular. 



ii. Rothbury Colleries* (No. 2 sample). Coke fairly swollen, firm and 

 lustrous. Ash grey; semigranular. 



iii. Ebbw Main, Greta, f Bands picked out; coke fairly swollen, firm and 

 lustrous. Ash buff-coloured; semigranular. 



iv. Stanford Merthyr.t Coke slightly swollen, firm and lustrous. Ash 

 buff-coloured; semigranular. 



v. Pelaw Main.§ Coke well swollen, firm and lustrous. Ash light reddish 

 tinge; semigranular. 



vi. Hebburn.H Coke fairly swollen, firm and lustrous. Ash pink; semi- 

 granular. 



The above table gives analyses of two samples of coal from 

 the Rothbury Collieries; and analyses, for comparison, from the 

 same seam in four other collieries. The Rothbury coal is very 

 suitable for gasmaking and steaming, and also makes a good coal 

 for household purposes. It gives only a small percentage of 

 small coal, and is a good coal for shipment, as it stands handling 

 well. 



This seam has a floor of dark shale, and the sandstone and 

 conglomerate have been proved for about 20 to 24 feet below. 

 Then there is a gap of approximately 20 feet, in which the strata 



* Analyses kindly supplied by Mr. Richard Thomas, Jr., Manager, 

 t E. F. Pittmau, " The Coal Resources of New South Wales." Geological 

 Survey of N. S. Wales, 1912, p.68. 



X Idem, p. 75. § Idem, p. 73. || Idem, p. 69. 



10 



