COAL    AND    OIL    IN    UINTA    COUNTY,    WYO.  341 
Proximate  analyses  of  coals  from  southern  Uinta  County,  Wyo. — Continued. 
COALS   OF  UPPER   MONTANA-LARAMIE   AGE,    INCLUDING    ADAVILLE    AND   TWIN    CREEK   COALS. 
Ash. 
Sul- 
phur. 
0.  50 
1.18 
Mois- 
ture 
in  air- 
dried 
ash- 
free 
sam- 
ple. 
9. 16 
9.20 
14.14 
Vola- 
tile 
com- 
busti- 
bles. 
Fixed 
car- 
bon. 
Calorific 
values. 
Source  of  sample. 
As 
deter- 
mined. 
Cal- 
culat- 
ed for 
air- 
dried 
ash- 
free 
sam- 
ple. 
Analyst. 
Ui  ion    Pacific    Coal    Co., 
6.  30 
1.18 
5.26 
37.  59 
41.93 
41.79 
53.  25 
48.87 
44.07 
(a) 
Twin  Creek  mines. 
5,  440 
5,  631 
6, 612 
6,396 
Do 
Average    of    upper    Mon- 
tana-Laramie  roals. 
4.25 
.84 
10.  83 
40.44 
48.  73 
5,  535 
6,  502 
COALS   OF   EVANSTON    OR   POST-LARAMIE   AGE,   INCLUDING   ALMY   COALS. 
Almy  No.  5,  lower  8  feet 
7.22 
0.21 
10.  02 
42.27 
47.70 
5,804 
6, 665 
F.  M.  Stanton. 
Michigan-Wyoming  mine. . 
16. 15 
[4.  45] 
9.36 
45.92 
44.72 
4,898 
6,365 
Do. 
Almy  No.  6. . 
6.55 
.29 
8.29 
37.  56 
54.  15 
6,  553 
6,  340 
7,012 
6,891 
Almy  No.  5,  lower  9  feet 
8.00 
.44 
8.07 
39.  20 
52.  73 
Do. 
Almy  No.  7,  upper  seam 
9.  00 
8.10 
38.33 
53.  57 
6,145 
6, 753 
Do. 
Almy  No.  7,  lower  seam  . . . 
5.  90 
.65 
9.37 
35.  65 
54.  98 
6,017 
6,  393 
Do. 
Almy  No.  5,  middle  2|  feet. 
9.  25 
7.54 
40.  20 
.vj.'jr, 
5, 933 
6,  538 
Do. 
Almy,  average  of  three  an- 
alyses. 
7.46 
6.  29 
40.  33 
53.  38 
Persifor  Fraziei 
,  jr.c 
s.  83 
8.88 
6.  3!) 
8.85 
8.88 
9.15 
43.  42 
43.  04 
37.  59 
47.  73 
47.  08 
53.26 
O.  D.  Allen.*' 
Do. 
.1.  V.  Hodge. e 
Do . . . 
Do 
Almy  No.  5 
9.70 
.10 
9.  64 
44.  73 
45.63 
.1.  S.  Cory.'' 
Almy  No.  6 
2.  80 
.14 
9.97 
44.  10 
45.  93 
Do. 

average  of  Evanstoncoalsc 
S.  16 
9.  30 
8.73 
40.  95 
50.  24 
5,956 
6,660 
a  Mineral  Resources  of  the  United  States  [for  1882],  U.  S.  Geol.  Survey,  1883,  p.  88. 
f>  The  heating  power  of  Wyomirg  coal  and  oil:  Special  Bull.  Univi  rsity  of  Wyoming,  January,  1895. 
c  [Fourth  Ann.]  Prelim.  Rept.  U.  S.  Geol.  Survey  Wyoming  and  contiguous  Territories,  1871,  p.  184. 
d  Rept.  Geol.  Expl.  40th  Par.,  vol.  3,  1870,  p.  473.' 
«  [Fourth  Ann.]  Prelim.  Rept.  U.  S.  Geol.  Survey  Wyoming  and  contiguous  Territories,  1871,  p.  321. 
/Chemist  in  charge,  Dept.  Mines,  World's  Columbian  Exposition. 
9  Omitting  Michigan-Wyoming  mine,  which  probably  represents  an  accidental  sulphur  ball. 
From  these  analyses  and  the  general  physical  character  of  the  coals,  the  Benton  coals 
are  to  be  regarded  as  high-grade  bituminous,  the  Evanston  coal  as  low-grade  bituminous, 
and  the  upper  Montana-Laramie  (Adaville  and  Twin  Creek  coals)  as  high-grade  black 
lignites. 
According  to  the  carbon-hydrogen  ratio  classification  of  coals  recently  proposed  by 
M.  R.  Campbell, a  these  coals  fall  in  the  following  groups: 
The  Willow  Creek  coal,  of  Benton  age,  falls  in  Group  G,  which  includes  the  Upper  Free- 
port  and  Pittsburg  coals  of  northern  West  Virginia,  Kanawha  Valley  coals,  high-grade 
Kentucky  coals,  and  Alabama  coals. 
The  Kemmerer  (Benton)  coal  belongs  to  Group  H,  which  includes  Indian  Territory 
coals,  Kansas  coals,  high-grade  Illinois,  Iowa,  and  Missouri  coals,  and  second-grade  Ken- 
tucky coals. 
a  The  classification  of  coals:  Trans.  Am.  Inst.  Min.  Eng.,  Washington  meeting,  May,  L905. 
