304 cox. 
with fresh samples. Therefore, a sample from a new face of 
the coal from the mine of the East Batan Coal Company was 
secured for the following absorption experiments and brought 
to the laboratory in a sealed container. A portion of the sample 
was ground to pass a sieve having 2 meshes to the centimeter 
(5 meshes to the inch) and graded into the following sizes: 
Passed sieve. Held on sieve. 
a Ee ee = | Welght 
Portion. of frac- 
Meshes | Meshes | Meshes | Meshes tion. 
per cm. | per inch.| per cm. | per inch. 
Grams 
A 2 5 10 2, 005 
B 4 10 8 20 1, 080 
Cc 8 20 24 60 735 
D 24 60 40 100 50 
i E 40 100 60 150 50 
F 60 ABO ia | ates cael eee 15 
—— | 
Analyses of these portions are as follows: 
TABLE VII.—Analyses of portions of a Philippine coal passing sieves of 
different sizes. 
Constituent. 
Portion. “opm: aa Ge Color of ash. 
- combus- 1X 
Moisture. tible owian. Ash. Total. 
matter. 
Per cent. | Per cent.| Per cent. | Per cent. | Per cent. 
A 22. 82 33. 64 39. 04 4.50 100.00 | Dark brown. 
B 22.87 34.32 38. 33 4.98 100.00 | Yellowish brown. 
(0) 23.04 33. 28 38. 66 5. 02 100.00 | Yellowish brown. 
D 22.51 33.82 38.34 5.83 100.00 | Yellowish brown. 
E 21.85 33. 19 39.15 5.81 100.00 | Dark brown. 
F 21.96 33. 67 37.77 6.60 100.00 | Dark brown. 
The relative rate of the absorption of oxygen was obtained 
for a 20-gram sample of each of the following: namely, A quickly 
ground in a mortar which IJ will designate AA, A, C, H, and F 
when each was placed in a piece of apparatus like that shown in 
fig. 1. About two hours were required to crush, sift, and weigh 
the portions and samples, except AA, and to exhaust, seal, and 
begin the actual measurements. The results are as follows: 
