North  dakota-montana   lignite   area. 
323 
In  the  following  analyses  the  fixed  carbon,  volatile  matter,  and  ash  arc  computed  on  a 
dry  basis: 
Analyses  of  lignite  from  carious  mines  in  North  Dakota. 
Mine  and  location. 
Mouse  River  Lignite  Co.,  Burlington: 
4  feet  from  bottom 
Top 
1G  inches  above  clay  sea,:.) 
Lower  20  inches 
felectric  mine,  Kenmare: 
4  feet  from  floor 
3  feet  from  floor 
Bottom 
Top 
Diamond  mine,  Kenmare: 
Top 
Center 
Lower  18  inches 
Dakota  Lignite  and  Brick  Co.,  near  Burlington 
New  Era  mine,  near  Minot 
Smith-Keninare  Dry  Coal  Co.: 
Next  to  clay 
Next  to  roof 
1  foot  below  roof 
Wadeson  mine,  Sims 
Lehigh  mine , 
Satterlund  mine,  near  Washburn 
Washburn  mine,  Wilton 
Dickinson  Brick  Co 
Heart  River,  near  Dickinson 
Consolidated  Coal  Co.,  New  Salem 
Fixed 
carbon. 
Volatile 
ni.ii  ter. 
Ash. 
51.28 
35.  83 
LI.  89 
46.  42 
32.60 
20.98 
47.  36 
42.14 
10.50 
52.  96 
38.  93 
8.  II 
57.  9.5 
34.  41 
7.  64 
59. 19 
36.  56 
4.25 
56.  58 
34.  44 
6.98 
56.  87 
36.  58 
6.  55 
52.98 
37.  24 
9.78 
5G.  82 
33.  77 
9.41 
56.  97 
36.  28 
6.75 
55.  61 
40.08 
4.30 
57.  66 
38.22 
4.12 
55.  55 
36.  79 
7.67 
52.30 
39.  90 
7.80 
55.25 
33.  50 
11.25 
50.  47 
39.  21 
10.32 
51.62 
43. 18 
5.21 
55.89 
37.50 
6.  61 
54.  93 
38.75 
6.  32 
46.89 
38.  23 
14.88 
60.  49 
38.  31 
1.20 
53.86 
41.  06 
4.48 
Mois- 
ture. 
32.  00 
30.00 
29.  40 
34.  70 
32.  90 
35.  00 
34.  8 
34.8 
33. 00 
33.  00 
33.  00 
23.  40 
33.6 
33.2 
32.  00 
32.  60 
30.  29 
34.3 
30.  91 
31.  82 
27.82 
14.25 
27.48 
Tests  of  the  lignite  as  a  gas  producer  were  carried  on  at  the  coal-testing  plant  at  the 
Louisiana  Purchase  Exposition,  and  the  results,  which  arc  embodied  in  Bulletin  No.  261, 
show  that  the  lignite  is  an  exceptionally  good  gas-producer  fuel.  It  would  be  ideal  for 
the  purpose  except  for  the  tendency  to  clinker. 
Lignite  in  the  Little  Missouri  River  basin  south  of  Medora,  N.  Dale. — The  coal  seams 
described  under  this  heading  outcrop  in  the  valley  of  the  Little  Missouri  and  its  tributaries, 
the  area  within  which  they  occur  extending  .50  miles  south  of  the  Northern  Pacific  Rail- 
way. Lignite  is  abundant  in  this  district,  and  the  seams  are  both  numerous  and  thick. 
Four  or  five  workable  beds  are  occasionally  present  in  a  vertical  distance  of  200  feet. 
Seams  6,  8,  or  10  feet  thick  are  of  common  occurrence,  while  several  beds  with  a  much 
greater  thickness  are  found.  The  seams  will  be  described  in  the  order  of  their  appearance 
from  Medora  up  the  river. 
Near  the  base  of  the  bluffs  at  Medora,  at  an  elevation  of  40  feet  above  the  river,  is  a  9- 
foot  seam  which  has  been  mined  for  a  number  of  years.  Thirty-one  feet  above  this  is  an 
upper  seam  4  feet  thick.  Five  miles  south  of  Medora,  at  the  Custer  Trail  ranch,  two  5-foot 
seams  outcrop  in  the  bluffs  on  the  east  side  of  the  valley,  one  75  and  the  other  130  feet 
above  the  river.  Four  and  a  half  miles  farther  up  the  river  a  seam  of  lignite  15  feet  thick 
outcrops  in  a  cut  bank  just  above  water  level.  It  contains  several  clay  bauds  inclu ding 
one  12  inches  thick  near  the  top  of  the  seam.  Lignite  is  mined  here  by  the  ranchmen  of 
the  vicinity,  but  the  mine  is  difficult  of  access  except  in  winter,  when  teams  may  be  driven 
to  it  on  the  ice.  Still  farther  up  the  river,  on  the  Ilanley  ranch,  about  3  miles  below  I  lie 
mouth  of  Third  Creek,  6  to  8  feet  of  lignite  are  exposed  in  the  bluff  along  the  Little  Missouri. 
