— 149 — 
TABLE N, I 
Weighed out 4279 kg. of Coal S. J.B. and S.J. T. — 100°/, by 
weight. 
Average sample n. 0 contains 34.9 per cent. of ash. 
Ne PRODUCTS 9g WEIGHT] °/o ASH |9/, SULPHUZ 
i |Coaln. 2a «@ ee 8 © % en bee we ee 32.45 13.7 0.6 
2 NCO cag iw em os we eS OS Oe Rw 42.49 23.7 
3 {Shale with pyrites. 2. 6 «© «© 2 6 © «© © we ew 43.84 50.4 
4 |Slimen. 1 6 «© © © © © © © © ©» we we ww 5.413 18.0 
S [Slime ne 2. a 6 He ee oe eR ewe ee ee 6.51 26.6 
Total. . « « « © ee 100.0.) 
As will be seen from this table this test yielded : 
32.45 °/, of coal n. 4 containing 13.7°/, of ash and 0.6 /, of 
sulphur. 
Further 42.10 °/, of coal n. 2 with 26 7°/,ofash were ultimately 
jigged, as well as 13.81 °/, of shale with pyrites containing 50.4 °/,of 
ash. 
Slime n. 1 of which there was 5.13 °/,, contained 18.0°/, of ash 
and could be added to coal n. 2. 
Slime n. 2 contained 26.6 °/, of ash, and could be added to coal n. 2 
as well. 
The shale with pyrites was made to undergo a separate test in 
order to obtain pure pyrites. 
Calling the quantity of shale and pyrites 100, it is possible to 
obtain therefrom 78.22 °/, of shaleand 21.78 °/, of pyrites bv jigging. 
One-fifth of this product can therefore be obtained as pure pyrites. 
Briquetting-test with coal n, 1, from test n, 1 
The whole of the Coal n. 1 mentioned in table n. 1 was used for 
making a test at the Altstaden Mine, in order, as tar as possible, to 
obtain results similar to those that would ba obtained in practice. 
The coal was briquetted after adding 5.5 °/, of pitch. 
