Peckham and Linton — Trinidad Pitch. 



205 



leum ether; high in material soluble in boiling spirits of 

 turpentine and chloroform, and at the same time they are low 

 in the percentage of total bitumen soluble in boiling spirits of 

 turpentine. This apparent contradiction is easily accounted 

 for when the high percentage of material soluble only in 

 chloroform is observed. The proper interpretation of these 

 results in reference to the aging of asphalt awaits the comple- 

 tion of investigations now in progress. 





Table No. 1. — Analyses of Trinidad Pitch. 





No. 



Petrolene. 



Asphaltene. 



Total 

 Bitumen. 



Organic 

 Not Bitumen. 



Inorganic. 



a. 



b. 



1. Mean 



33-600 

 33635 



33-63 7 



17-150 

 17-200 



17-175 



50-791 



11-625 

 11-850 



11-737 



37 625 

 37-300 



37-462 



a. 



b. 



2. Mean 



33-640 

 33-600 



33-620 



18-888 

 18-468 



18-678 



52-297 



11-347 



11-652 



11-499 



36-123 



36-280 



36-201 



a. 



b. 



3. Mean 



33-637 

 33511 



33-574 



23 621 

 23-034 



23-327 



56-901 



7-840 

 8988 



8-414 



34-902 

 34467 



34-684 



a. 



b. 



4. Mean 



33-769 

 33-703 



33-736 



18-764 

 18498 



18-631 



52-367 



10-564 

 11-138 



10851 



36903 

 36-555 



36-729 



a. 



b. 



5. Mean 



33600 

 33650 



33-625 



18-000 

 18-500 



18-250 



51-875 



10-500 

 9 800 



10-150 



37-900 

 38-050 



37-975 



a, 



b. 



6. Mean 



36-650 

 36-650 



36-650 



17200 

 17-250 



17-225 



53-875 



10-800 

 10-775 



10-787 



35-350 

 35-325 



35-337 



a. 

 7. Mean 



36-392 

 36-392 



36-372 



17151 

 17-245 



17-198 



53-570 



10-491 

 10-410 



10450 



35-961 

 35-990 



35975 



a. 



b. 



8. Mean 



36-300 

 36 650 



36-475 



17-975 

 17-800 



17-887 



54-362 



9-900 

 9-850 



9-875 



35-725 

 35-700 



35-712 



a. 



b. 



9. Mean 



35-950 

 35-950 



35-950 



18050 

 18-100 



18-075 



54-025 



10-875 

 10-690 



10-782 



35-125 



35-260 



35-192 



a. 



b. 

 10. Mean 



33-730 

 33-730 



33-730 



18-948 

 18-750 



18-849 



52-579 



11-390 

 11-667 



11-528 



35-930 

 35-842 



35-886 



a. 



b. 



11. Mean 



21-200 

 21-525 



21-362 



30-375 

 30-250 



30-312 



51-674 



9-600 

 10-100 



9-850 



38-500 

 38450 



38-475 



a. 



b. 



0000 



0000 



3-000 

 3-000 





43-525 

 43-550 



53-475 

 53-450 



