340 
CONTRIBUTIONS    TO    ECONOMIC    GECLOGY,   L905. 
VII.  Kemmerer  Coal  Company,  Kemmerer  No.  1  mine,  Frontier,  Wyo.  Sample  taken  from  roorr. 
46,  entry  3  south,  600  feet  west,  and  2,250  Eee1  south  of  mouth  of  mine  Sample  represents  a  complete 
section  of  coal.    No  definite  partings. 
VIII.  Kemmerer  Coal  Company,   Kemmerer  No.  1   mine,   Frontier,  Wyo.    Sample  from  working 
face  in  new  opening  in  lower  bed.     From  mouth  of  mine  <>00  feet  south,  250  feet  cast  (this  portion  is  at 
crosscut  from  the  m  iin  seam  to  the  lower  bed),  and  250  feet  south  of  working  face.     Bed  is  (P  feet  thick 
and  40  feet  below  main  bed.     Band  of  dirt  6  inches  thick  4  feet  from  floor  omitted  in  sampling. 
IX.  Kemmerer  Coal  Company,  Willow  Creek  opening,  SW.  I  NW.  \  sec.  L9,  T.  22  N.,  R.  115  W.  Sam- 
ple from  face  of  cut  ry  L50feet  from  mouth  of  mine.  Bed3feet  thick,  with  no  partings.  Regarded™ 
owners  as  a  coking  coal. 
X.  Richardson  mine,  NW.  \  sec.  VI,  T.  15  N.,  R.  1  L8  W.  Sample  taken  150  feet  west  and  50  feet  north 
of  mouth  of  mine.     Clay  seam  3  inches  thick  and  1  foot  from  floor  omitted  in  sampling. 
In  order  thai  these  analyses  may  be  compared  with  others  which  have  already  Ween 
made  in  this  region,  the  following  table  has  been  prepared,  with  the  analyses  separated 
into  groups  according  to  the  geological  horizons  of  the  coals.  The  ash  and  sulphur — 
which,  while  accidental  impurities  varying  greatly  from  point  to  point  in  the  same  bed, 
are  still  of  great  commercial  importance  have  been  calculated  on  the  basis  of  air-dried 
samples.  The  moisture,  volatile  combustible  matter,  and  fixed  carbon  have  been  recal- 
culated on  the  basis  of  the  air-dried  ash-free  samples. 
Proximati  analyses  of  coals  from  southern  Uinta  Count  y,  Wyo. 
COALS  OF  BENTON  (CRETACEOUS)  \<.i:.  INCLUDING  THE  K  KM  M  ERER,  WILLOW  CREEK  CARTER,  AND 
SPRING  VALLEY  BEDS. 
Calorific 
values. 
Ash. 
Sul- 
phur. 
Mois- 
ture 
in  air- 
dried 
ash- 
fri  e 
sam- 
ple. 
Vola- 
tile 
com- 
busti- 
bles. 
Fixed 
car- 
bon. 
Analyst . 
Source  of  sample. 
As 
deter- 
mined. 
7,. Mill 
Cal- 
culat- 
ed Eor 
air- 
dried 
ash- 
free 
sam- 
ple. 
.1.  D.  Curtis,  Hams  Fork, 
prospect  sample. 
LOO 
i . .".  i 
39.01 
59.  15 
Slosson  and  K nig] 
t.i 
William      Goodell,      Hams 
Fork,  ii  fool  lac  sample. 
I.e.", 
3.07 
39.65 
7,  167 
7,782 
Do. 
\.    Kendall,    Bams    Fork, 
prospect  sample. 
3.60 
.60 
3.89 
38.65 
57.  Hi 
7,372 
7.(117 
Do. 
Cumberland   No.   1.   Kem- 
r  bed. 
1.69 
43.91 
51.  Ki 
w.  s.  Robinson.6 
Cumberland   No.  •_>.   Kern 
merer  bed. 
:,.  13 
3.69 
43.  22 
53.09 
Do. 
Spring  Valley  No.  1,  Spring 
Valley  bed. 
7.  Hi 
12.80 
53.32 
Do. 
Kemmerer,     main      Kem 
merer  bed. 
7.51 
1.39 
:?.  87 
41.73 
.",1.  Ki 
6,870 
7,628 
F.  M.  Stanton. 
Kemerer,  lower  bed 
:;.  65 
1.07 
4.09 
H.86 
54.05 
7,  102 
7,527 
Do. 
Cumberland    No.    1.   main 
Kemmerer  bed. 
6.00 
.  43 
1.7.1 
13.53 
51.90 
6,815 
7,  CI' 
Do. 
Diamond\  ille,  main  Kem- 
merer  bed. 
Ltd 
.  19 
1.(17 
13.06 
52.  87 
7,202 
7,654 
Do. 
Richa  rdson,  Spring  Valley 
bed. 
13.67 
.94 
5.09 
42.53 
52.38 
6,305 
7,530 
Do. 
Kemmerer,   Willow   ('reek 
bed. 
1.77 
.77 
•_'.  73 
38.54 
58.  7:; 
7/501 
7. 'I'M 
Do. 
Average  of  Benton  coals  c. . 
5.69 
.83 
3.76 
41.54 
54. 61 
7, 133 
7,666 
"  The  beating  power  of  Wyoming  coal  and  oil:  Special  Bull.  University  of  Wyoming,  January,  1895. 
'-  These  analyses,  made  in  the  laboratory  of  the  Onion  Pacific  Coal  Company,  were  selected  from 
many  hundreds  by  Mr.  Frank  Mauley,  chief  engineer,  as  typical. 
-  i  tie  averages  are  not  entirely  satisfactory  in  the  volatile  combustible  and  fixed  carbon  columns, 
■•is  it  is  evident  from  a  <  omparison  of  analyses  thai  two  different  methods  have  been  used  in  the  deterj 
mination  of  these  values.  The  Slosson  and  Knight  values  are  alw  aj  a  higher  in  fixed  carbon  than  the 
Stanton  values,  without  any  corresponding  increase  in  the  calorific  value.  Thus  in  the  Almy  coals 
where  ih,.  moisture  is  the  same  Stanton  finds  a  value  6,365  calories  from  a  sample  showing  "  Fixed 
carbon  14.72  per  cent,"  while  Slosson  and  Knight  obtained  a  value  of  6,393  calories  from  a  sample  show! 
ing  "  Fixed  carbon  :»i. US  per  cent." 
