GEOLOGICAL SURVEY OF THE TEERITORIES. 



;2i 



and ranges from this to twenty or thirty per cent., very rarely exceeding 

 forty per cent. The composition of the American varieties, so far as 

 found by the writer, is contained in the following table, which also gives 

 the localities of the principal mines worked and the thickness of the beds. 

 The water was determined by drying the coarsely-pulverized coal in an 

 oil bath below the temperature of boiling oil and above that of boiling 

 water, continuing the drying for several hours till the coal ceased to 

 lose weight. The fixed carbon in all these analyses is uncertain in 

 quantity, as its amount varies through a few per cent, according to the 

 greater or less heat employed in expelling the volatile matters. 



ANALYSES OF COALS FROM THE ROCKY MOUNTAINS. 



Locality. 



S 



O 

 rr 4^ 



p - 



-Mr3 

 O O 



H 



> 



o 

 Ph 



m 





A 



© 

 > 



a 



o 



% 



Description. 



Golden City. C T., 56 feet 



below surface. 

 Golden City, C. T.. north end 



of 100 feet level. 



Bo 



110 S-. 



6 to 10 



to 10 



6 to 10 

 6 to 10 



14 to 16 



1.32 

 1. 354 



1.345 



13.43 



13.67 



13.10 

 12.70 



13. 83 

 13.70 



13. 90 

 12.00 



14. 80 



15. 00 



6.80 



12.12 



13.26 

 8.12 

 7.00 



8.58 

 10.66 

 3.28 



3.85 



4.00 



3.70 

 4.10 



5.85 

 5.80 

 4 30 

 5.20 

 3.40 

 3.85 



8.00 



3.76 



4.87 

 2.00 

 1.73 

 6.30 

 3.11 

 4.71 



37.15 

 34. 75 



45.57 

 47.58 



Gray ash. 



Golden City. C T., south end 



of 100 feet level. 

 Murphy's, Ealston Creek, C. T. 

 Do 



105 S-. 









35.88 



44.44 



Orange-colored ash. 



Do ... 









33.08 

 34.50 

 30.50 



35.48 



29.75 



29.46 

 36. 65 

 36. 81 

 35.22 

 38.23 

 47.05 



49. 72 

 47.30 

 50.65 



49. 72 



54.37 



52.41 

 53.23 





Marshall's, Boulder Co., C T. 

 Briggs's, Boulder Co., 0. T. . . 

 Baker's, Boulder Co., C. X ... 



Carbon, W. T 



06 S. . 

 84 S-. 

 86 S.. 



HOW. 



262 W. 



10 

 13 



7 

 6 

 3 



1.33 

 1.27 

 1.32 



1.33 



1.32 



1.32 



Gray ash ; light, bulky. 



Orange-colored ash. 



Olive- brown ash ; coal 

 hard and toagh. 



Light-gray ash.; nearly 

 'white. 



Gray ash ; smoke whit- 

 ish. 



Hallville, W. T., upper bed . . 

 Hallville, W. T., lower bed . . 



Van Dyke, W. T : 



313 W. 



315 W. 

 442 W. 

 480 W. 



4h 1.27 



9iJ 1.29 



26 1 - 30 





Bock Springs, W. T 



Evanston, IT. T 



54. 46 5 coals make coke. 

 49. 90 



Crissman's, Coalville, TJ. T .. 



12 



1.32 



48. 00 



44. 90i Bv W. T: Blake, Janu- 













ary,. 1867. 



Texture frequently very apparent ; specific gravity about 1.2. At the 

 temperature of boiling water they commonly lose about 3 per cent. In the 

 analyses given the water thus obtained goes with the volatile matters in 

 the second column. They do not generally melt by heat:, but some of 

 them soften sufficiently for the particles to adhere together, and some 

 become fluid-like oils^ at a moderate elevation of temperature. These 

 last seem to belong altogether to fresh-water limestone formations, and 

 to be nearly related to the petroleum found in the same formations. 



Locality. 



< 



cs 

 "o 

 > 



M 



o 



-2 



ci 



Description.. 



TJtweiler, right bank of the Bhine . 



0.9 



4.6 



11.0 



5.6 



3.9 



10.0 



7.4 



31.8 



52.5 



50.0 



46.0 

 46.8 

 57.4 



49.0 



67.3 



42.9 



39.0 



48.4 

 49.3 

 32.6 



43.6 



Water, 5 per cent. ; compact, black, shining,. 



specific gravity,- 1:203. 

 Dull, brownish black ; powder, same ; compact. 



ash-brick color: 

 Shining black;: contains resin; compact, withi 



thin, jet-like layers. 







Enfant Dort, mouths of the Rhone. . 



Black, with irregular, shining fracture. 



Compact; brilliant black color ; irregular frac- 

 ture; powder, brownish black ; yields coke. 



Compact ; black, greasy luster ; powder, clears 

 brown ; used by blacksmiths. 







21 G 



