i74 THE POPULAR SCIENCE MONTHLY 



Flows (melting point N. Y. T. L. method) 151° P. 



Penetration at 77° F., 5 sec, 100 grams, No. 2 needle 3.0 mm. 



Loss 20 grams 325° F., 7 hours, 21" dish .' 2.9 per cent. 



Character of residue Smooth 



Penetration at 77° F., 5 sec, 100 grams, No. 2 needle 1.2 mm. 



Loss 20 grams 400° F., 7 hours, 24/' dish 7.2 per cent. 



Character of residue Smooth 



Penetration at 77° F., 5 sec, 100 grams, No. 2 needle .4 mm. 



Loss 50 grams at 325° F., 24 hours, 2£"XH" dish . . 3.9 per cent. 



Character of residue Smooth 



Penetration at 77° F., 5 sec, 100 grams, No. 2 needle .5 mm. 



Bitumen soluble in CS 2 air temperature (70° F.) ... 94.6 per cent. 



Difference 1.5 per cent. 



Inorganic or mineral matter 3.9 per cent. 



100 per cent. 



Bitumen soluble 88° naphtha, air temperature (70° F.) 67.3 per cent. 



This is per cent, of total bitumen 71.2 per cent. 



Carbenes — per cent. bit. insol. CC1 4 air temp. (70° F.) None 



Bitumen yields on ignition: Eesidual coke 12.9 per cent. 



Sulphur 5.5 per cent. 



It appears from the above that the Bermudez asphalt is differentiated 

 completely" from that found in the Trinidad pitch lake, by the absence of 



Photo, W. H. Rau, Philadelphia. 

 Railway Terminal at Guanaco, Pier in Distance. 



