182 



cox. 



hold good for Philippine noncoking coal? as is shown l)y the following 

 results : 



Proximate analyses of the coah. 



[The figures give percentages.] 



Source of the coal. 



Jletliod of 

 analysis. 



Water. 



Volatile 

 combus- 

 tible. 



Fi.xed 

 carbon. 



Ash. 



Sul- 

 phur. 



Cebil, near Carmen-- 

 Do 



Smoking-off*' — 

 do 



14.61 



14.71 

 5.88 

 5.90 



35.58 

 35.43 

 39.18 

 39.39 



48.16 

 48.29 

 48.90 

 48.75 



1.65 

 1.57 

 6.« 

 5.96 



0.12 



Polillo 



Do 



do 



do J 







Analyses of the residues from which the volatile matter has heen expelleii.*^ 

 [The figures give percentages.] 



Source of the coal. 



Combustible 

 matter." 



Ash. 



Sulphur. 



Cebu, near Carmen __ 



96.69 

 96.85 

 89.01 

 89.11 



3.31 

 3.15 

 10.99 

 10.89 



Trace. 



Do 



Polillo - - _ — _ 





Do 









^ By difference. 



Calorific value. 

 [The figures give calories.] 



Source of the coal. 



Of the residue from which 

 the volatile matter has 

 been expelled. 



Of the pure fixed carbon. 



1. 



2. 



3. 



1. 



2. 



3. 



Cebu, near Carmen__ 

 Polillo- 



7,826 

 7,233 



7,830 

 7,239 



7,815 

 7,249 



8,087 

 8,122 



8,091 8,076 1 

 8,128 S. 140 1 









The fixed carbon from a powdered sample of most of the kno\\Ti coal 

 of these Islands is somewhat similar to wood sawdust charcoal. It 

 is veiy granular and it seldom manifests any tendency to sinter together.''- 

 The average of the six closely agreeing determinations given aljove of 

 the caloriiic value of the pure fixed carbon is 8,107 calories. This is 



"Accurate; large mechanical loss by official method. 



" These samiiles were obtained by expelling the moisture and volatile combus- 

 tible matter as outlined in This Journal, Sec. A (1907), 2, 44. cooled in a 

 desiccator and weighed directly from the crucible by difference, so that there was 

 no opportunity for the absorption of moisture. 



•^ Recentiv 2 coking coals have been discovered. 



