4(3 THE BOOK CLIFFS COAL FIELD. 
Ultimate analyses of coal sample* from the Book Cliffs coal field— Continued. 
20. 
21. 
25. 
29. 
34. 
4013. 
35. 
3585. 
3586. 
3729. 
3856. 
4015. 
Sample as received: 
5. 05 
1.30 
5.81 
68.84 
1.55 
17.45 
6, 809 
12,256 
13. 16 
6. 16 
1.26 
5.54 
67.48 
1.57 
17.99 
6,771 
12,188 
13.13 
14.40 
.48 
5.03 
58.42 
1.24 
19 S3 
5,815 
10,467 
LI. 39 
19- 02 
.58 
5.01 
59.10 
1.32 
14.97 
5,890 
10,602 
12. 45 
8. 18 
46 
4 .97 
62- 22 
1.25 
22.92 
6,035 
10, 863 
13. 77 
6.08 
. 83 
.» 26 
71 22 
1.29 
15 32 
7,239 
13,030 
14.41 
5.20 
3.60 
4.50 
2.30 
4.10 
2.90 
Air-dried sample: 
Ash 
5. 33 
1.37 
5.52 
72.f.2 
1 63 
13.53 
7,182 
12,928 
6.39 
1.31 
5. 33 
70.00 
1. 63 
15. 34 
" 7, 024 
12, 043 
15. 08 
.50 
5. 37 
61.17 
1.30 
16. 58 
6,089 
10,960 
19.47 
.60 
4.86 
(i0. 49 
1.35 
13. 23 
6,029 
10,852 
8.53 
.47 
4.71 
64.88 
1.30 
20.11 
6, 293 
11, 327 
2.". 
85 
5.09 
73. 35 
1 . 34 
13.12 
7,455 
13,419 
1-3. Sec. 34, T. 10 S., R. 98 W. 
1. Upper coal, sec. 3, T. 11 S., R. 98 W. 
5-8. Lower coal, sec 3. T. 11 S., R. 98 W. 
9. See. 6, T. 11 S., R. 98 W. 
10-12. Upper coal, see. 8, T. LOS., R. 99 W. 
13. First coal below upper coal, sec s, T. LOS., 
R. 99 W. 
14. Sec. 7, T. 10 S., R. 99 W. 
1.",. Sec. l,T. LOS., R. 100 W. 
16. Sec. 36. T.9S., P.. 100 \\ . 
17. See. 35, T. 9S.,R. 100 W. 
18. Sec. 5, T. 9S., R. 1(H) W. 
19. Sec 27, T. 8S., R. 101 W. 
20. See. 29, T. 8S., R. 101 W. 
Weathered sample. 
Weathered sample. 
21. Sec. 30. T. 8 S., R. 101 W. 
22. Sec. is, T. ss„ R. nil W. 
23. Sec. 16, T. 7 S., R. 102 \Y. Weathered sample. 
24. Sec. 11, T. 7 S., R. 104 W. 
25-27. Sec. 14, T. 7 S., R. 104 W. 
2s. U miles nort invest of Nash's ranch, Utah. 
29. 5 miles north of Thompsons, Utah. 
30.' 5 miles north of Thompsons, Utah. 
31. miles northeast of Solitude, Utah. 
32. 4 miles east of Woodside, Utah. 
33-34. 8 miles south of Sunnyside, Utah. 
3.".. West side of Horse Canyon, 6 miles south of 
Sunnyside, Utah. 
Inspection of the table of proximate analyses of air-dried coals 
shows the following range in percentages: Moisture, from 2.37 to 
10.48; volatile matter, from 31.90 to 38.28; fixed carbon, from 43.75 
to 55.69; ash, from 4.86 to 19.47. The table of ultimate analyses of 
air-dried coals shows the following range: Hydrogen, from 4.71 to 5.64; 
carbon, from 60.49 to 73.35; nitrogen, from 1.13 to 1.65; oxygen, from 
13.12 to 20.96; sulphur, from 0.47 to 1.37. The calorific values, de- 
termined with a Mahler bomb calorimeter, range from 10,852 to 
13,419 British thermal units. 
Bearing in mind that the range shown by the analyses is partly due 
to different stages of weathering of the samples collected, although 
care was taken to obtain as fresh coal as possible, the analyses indicate 
that the coals from the different parts of the area examined are not 
strikingly different. The marked variations in quality of near-by 
coals, not uncommon in Rocky Mountain fields, especially in 
Colorado, are not found in the area here considered. Igneous rocks 
are not known to occur in the Book Cliffs, and the coals are not lo- 
cally metamorphosed. There are many minor differences, however. 
In the eastern part of the field, for instance, a comparison of analyses 
of mine samples of coal from the upper and lower beds shows that the 
