346 COX, REIBLING, AND REYES. 
XVII show that both the Uling and Danao coal should rank 
among good limekiln coals, as they are high in hydrogen and 
volatile constituents, low in ash, sulphur, and fixed carbon, and 
sufficiently high in calorific value. 
TABLE XVII.—Calorific value and proximate analyses of Cebu coals. 
| 
Danao | Naga coal from Uling mine. 
coalfrom 
Camansi 
Constituent. mine, 
Lower | Lower 
average 
of nee ledge ledge Upper 
samples.| No. 1. No. 2. coal. 
10. 01 14.90 11.85 19. 23 
437.93 38. 63 38.67 35.44 
46. 30 41,91 45.37 39. 10 
5.76 4,56 4.08 6.53 
0.77 0.35 0.39 0. 43 
Calorifie value in calories: 
Withimoistures=) sess eeees 6, 071 5, 744 6,017 5, 300 
| Dry vss: ses eee 25 eee ee 6, 746 6, 840 6, 897 6, 676 
8 Hydrogen=5.90 per cent. 
It further appears that sandstone, sand, and limestone of 
good quality are available in quantity. All the necessary raw 
materials, including coal, can be found in large quantities about 
11 kilometers up the Danao River. The upper coal seams are 
covered with a sandstone formation varying in thickness up to 
about 6 meters, and large deposits of soft coralline and hard, pure, 
calcite limestone are in the immediate neighborhood. The 
ultimate chemical composition of available sand- and limestone is 
given in Table XVIII. 
TABLE XVIII.—Analyses of raw materials near Danao. 
Constituent. Sandstone. | Limestone. eas 
Silica (SiO 2) 30. soe eee 72.76 | 0.38 2.61 
Aluminium and ferric oxides (R2Os) ------ 15.58 0.18 | 2.28 
Galciumfoxide!(CaO)ie-sesenee eee 1, 42 55. 62 52.85 
Magnesia (MeO) =2-2 anes. oes enn eee 0. 62 0.00 0. 88 
Baguio, Benguet.—The lack of local building materials and the 
great expense of importing the same into the mountain capital 
of the Philippine Islands has led many to advocate the establish- 
ment of a sand-lime brick plant at Baguio. Limestone and soft, 
