X, A, 4 



Pratt: Petroleum and Residual Bitumens 



265 



and Tayabas in specific gravity and that all three petroleums 

 contain high percentages of burning oils ; all three oils, likewise, 

 are high in paraffin. 



Determinations by Mr. Arguelles show that the lustrous black, 

 solid material from the outcrop at B contains 94.53 per cent of 

 bitumen soluble in carbon disulphide, 3.89 per cent of paraffin 

 scale, and 26.62 per cent of fixed carbon. The specific grav- 

 ity of the sample tested was 1.068. The material cokes upon 

 distillation. 



Determinations by Mr. Arguelles on a sample of the sticky bit- 

 umen from the outcrop at D showed: Specific gravity, 1.016; 

 total bitumen, 81.84 per cent; paraffin scale, 0.30 per cent; fixed 

 carbon, 6.59 per cent. The penetration (test with No. 2 cambric 

 needle for five seconds with 100 grams' weight) is 1.3 millimeters 

 at 30° C. and 2.6 millimeters at 50° C. The softening point of 

 this material is 35° C. 



Determinations by Mr. Arguelles on the brownish black, solid 

 bitumen from outcrops E, F, and G showed: Specific gravity, 

 1.026; penetration at 25° C, 0.6 millimeter; loss at 163° C. for 

 five hours, 3.28 per cent; total bitumen, 93.79 per cent; organic 

 insoluble constituents, 1.00 per cent; mineral matter, 5.21 per 

 cent; paraffin, 11.05 per cent; fixed carbon, 7.68 per cent. The 

 following table contains analyses of difi'erent samples of material 

 from outcrops at E, F, and G. Sample 1 represents pure bi- 

 tumen; sample 2, bitumen of poorer quality. 



Table VII. — Analyses of bitumens from outcrops E, F, and G, 



Villaba, Leyte." 



Conetituent. 



Moisture and loss at 100° C . 



Petrolene 



Asphaltene 



Organic nonbitumen _ 



Mineral matter _ 



Total . 



Sample 1. 



Per cent. 



0.56 



63.45 



28.59 



4.68 



2.88 



100. 16 



Sample 2. 



Per cent. 

 2.80 

 26.26 

 22.53 

 11.64 

 36.78 



100. 01 



■' Analyses by A. H. Wells, chemist, Bureau of Science. 



In the mixture of bitumen and clay-tufi" from outcrops L and 

 M Mr. Arguelles found 25.12 per cent of total bitumen, 21.6 

 per cent of which is paraffin scale. Mr, Wells distilled from 

 another sample of the mixture from these outcrops 17.46 per cent 

 (material as received) of heavy oil, which he fractionated as 

 follows : 



