Author:Berry, HDate:1949The No. 4 seam at this colliery, judging from the diagrammatic representations at the end of the report, appears to maintain a uniform structure and a fairly consistent thickness throughout the mine.Read more
Author:Van Eck, B; Van der Walt, PJDate:1956In this paper, the more practical aspects of coal sampling and sample treatment are discussed in order to serve as a guide in plant testing.Read more