2 cox. 
geologic conditions which produced the coking coal render a 
continuous seam improbable. On the other hand, this seam is 
an encouragement to prospectors to seek in the deeper beds for 
good, coking coal in regular seams, for a supply of coke is 
much needed in the smelting of the iron and copper which 
occur in the Islands. 
I have investigated the quality and means of utilization of the 
coal from as many representative sources as could be obtained. 
The quality of Philippine coal is shown by the following repre- 
sentative analyses and calorific values made by the Bureau of 
Science of samples collected during the past year: 
TABLE I.—Representative analyses and calorific values of Philippine coal. 
| Proximate analyses.* 
Mine sample. Air dried. 
Source. 
| 4 Volatile) ed Volatile) 
2 com- ix com- ixed 
£ Water. hustible|carbon.| “8h- | Water-hustiblelcarbon.| A8h- 
5 matter. matter. 
Per ct.| Per ct. | Per ct. | Per ct. | Per ct. | Per ct.| Per ct.| Per ct. 
DIP olillomre ee ee 9.01 | 42.61] 48.39 4.99 8.75 | 45.08 | 45.90 5.27 
43.58 | 48.60 4.06 
43.65 | 47.75 3.43 
44.18 | 49.15 2.26 
15 | Bulalacao, Mindoro 
16 | Comansi, Cebu_-_-__-----_- . 43.46 | 43.18 4.35 7.49 | 44.18 | 48.90 4.43 
17 | Camujamayan Valley, 
Cebutes a nanee ate eee 46.40 | 25.84 4.58 | 17.18} 60.05 | 27.88 4.94 
18) |Eeo (s Ce eee ee ees 44.13 | 38.87 4.76 | 18.67] 46.04| 385.33 4.96 
19) |52==2 CO Se Seamer nes 40.97 | 41.74 3.41 | 12.49} 41.63 | 42.41 3.47 
20 | Compostela, Cebu 40.14 | 47.51 2.92 | 8.10 | 40.73 | 48.21 2.96 
21 | Sibuguey Bay, Mindanao_| 6.81) 45.45} 45.92 1.82) 6.32} 46.17] 46.65 1.86 
22 | Margossa Tubig, Minda- | 
MAOH ae sae eee ee eee lee ere a lee | 2.25 6.83 | 87.62 3.30 
. For other and earlier analyses of Philippine coal see Cox, A. J., This Journal, Sec. A 
(1906), 1, 897; (1907), 2, 41; (1908) 3, 301; (1909) 4, 171. Analyses Nos. 6 to 14 were made 
by the ‘‘smoking-off method.”’ This Journal, Sec. A (1907), 2, 41. The empirical methods 
usually employed are not applicable to many of the Philippine coals, owing to certain 
peculiarities of the latter. The analyses as carried on by the “official method,” Journ. Am. 
Chem. Soc. (1899), 21, 1116, often indicate Philippine coal to be of a much poorer quality 
than is actually the case. 
