INDEX. 
Page. 
Air drying. See Drying, air. 
Alabama coal, ashes in 23 
moisture in 9,11 
specific gravity of 23 
sulphur in 23 
No. 2, ash in 23 
specific gravity of 23 
sulphur in 23 
No. 3, ash in 23 
moisture in 9, 11 
specific gra rity of 23 
sulphur in 23 
No. 4, ash in 23 
specific gravity of 23 
sulphur in 23 
Arkansas lignite, ash in 7,23,41.42 
carbon in 41,42 
mtisture in 7,11,41,42 
specific gravity of 23, 41 
sulphur in 23, 41, 42 
volatile matter in 41, 42, 43 
No. 1 B, moisture in 11 
No. 7 A, ash in 23 
moisture in 11 
specific gravity of 23 
sulphur in 23 
No. 7 B, moisture in 11 
No. 8, ash in 7 
moisture in 7, 11 
No. 9, moisture in 11 
Ash, determination of 6,7,8,23-28 
determination of, check on 6 
increase of, by abrasion in mill 8 
Ball mills, grinding in, increase in ash due to 8 
loss of moisture in :■ ... 11-12 
Brazil coal, ash in 23,25 
moisture in 11,18 
specific gravity of 23,25 
sulphur in 23, 25 
Bucking board, grinding on, loss of moisture 
in 10-13 
California, No. 1, moisture in 11,12 
Coal samples, amount of, effect of, on mois- 
ture 18-19 
history of 5 
method of taking, checking of 4-6 
Colorado coal, ash in 41 
carbon in 41 
moisture in 18 
sulphur in 41 
volatile matter in 41 
Drying, air, relative effects of furnace dry- 
ing and 8-9 
Drying reagents, comparative effects of 17-18 
Page. 
Grinding, increase in ash due to 8 
loss of moisture in 10-13 
Heating, duration of, effect of, on moisture. 18-19 
effect of, on volatile matter, determina- 
tions 41 
Illinois coal, ash in 7,22,23,30,41,42 
carbon in 41,42 
moisture in 7,9, 10-16, 18, 19, 20, 22, 41, 42 
specific gravity of 23 
sulphur in 22, 23, 30, 41, 42 
volatile matter in 41, 42, 43 
washing tests of 30 
No. 6 B, moisture in 11 
No. 7 D, moisture in 11,18 
No. 9 A, ash in 22,30 
moisture in 11, 20, 22 
sulphur in 22, 30 
washing tests of 30 
No. 9 B, ash in 22 
moisture in 11,20,22 
sulphur in 22 
No. 10, moisture in 11 
No. 11 A, moisture in 11 
No. 11 B, ash in 22,30 
moisture in 18, 20, 22 
sulphur in 22,30 
washing tests of 30 
No. 11 C, moisture in 11 
No. 11 D, moisture in 11, 18 
No. 12, moisture in 18 
No. 13, moisture in 11,18 
No 14, moisture in 11,18 
No. 15, moisture in '. 9, 11 
No. 16, moisture in 11 
No. 18, moisture in 18 
No. 19 A, moisture in 11 
No. 19 B, ash in 23,30 
specific gravity of 23 
sulphur in 23, 30 
washing tests of 30 
No. 19 C, moisture in 11 
No. 19 D, moisture in 11 
No. 20, moisture in 9,11 
No. 21, moisture in 11 
No. 22 A, ash in 7 
moisture in 7, 11 
No. 22 B, moisture in 9,11 
No. 23, moisture in 11 
No. 23 A, ash in 7 
moisture in 7, 11 
specific gravity of 23 
sulphur in 23 
No. 23 B, ash in 7 
moisture in 7,9 
45 
