 ... generally divides it into two varieties : — First, Coal without Bitumen. Second, Coal with Bitumen. The first variety is known by the general name of Anthracite. It has however various local names. [ANTHRACITE.] It is sometimes very hard, and has...  Manual of Mineralogy - Seite 85von James Dwight Dana - 1855 - 432 SeitenVollansicht - Über dieses Buch
 | J.D. Dana - 1855 - 440 Seiten
...compact and hard, and has a specific gravity from 1*3 to 1*75. It usually contains 80 to 90 per cent, of carbon, with 4 to 7 of water, the rest consisting...less lustrous. The specific gravity does not exceed 1-5.Pitching or caking coal, as it is distinguished in England, at first breaks when heated, into small... | |
 | Society for the diffusion of useful knowledge - 1858 - 808 Seiten
...[ANTHRACITE.] It is sometimes very hard, and ha« a high lustre, and is often iridescent. Besides being used for fuel, it is often made into inkstands, small boxes, and other articles of use. This is more especially the case with the Anthracite of America. It is the most common form... | |
 | 1858 - 810 Seiten
...[ANTHRACITE.] It is sometimes very hard, and has a high lustre, and is ofteu iridescent. Besides being used for fuel,, it is often made into inkstands, small boxes, and other articles of use. This is more especially the case with the Anthracite of America. It is the most common form... | |
 | Charles Knight - 1866 - 588 Seiten
...[ANTHRACITE.] It is sometimes very hard, and has a high lustre, and is often iridescent. Besides being used for fuel it is often made into inkstands, small boxes, and other articles of use. This is more especially the case with the Anthracite of America. It is the most common form... | |
 | Charles Knight - 1867 - 630 Seiten
...[ANTHRACITE.] It is sometimes very hard, and has a high lustre, and is often iridescent. Besides being used ~ & :+` F p Ȁ TqT + Z Y R, : 0L, f c(*_N 5k ч HZ of use. This is more especially the case with the Anthracite of America. It is the most common form... | |
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