274 PROCEEDINGS OF THE AMERICAN ACADEMY. 



The low percentage of hydrogen and high percentage of carbon in- 

 dicates that the benzol homologue was not completely removed. In 

 some of these distillates, the benzol hydrocarbon is present in such large 

 proportion that long continued action of the fuming acid is necessary to 

 remove it completely. 



The small amount of the distillate 180°-182° gave as its specific 

 gravity at 20°, 0.8154, and after treatment with the fuming acid, 0.8097. 

 A combustion of the treated oil gave 85.56 per cent of carbon and 13.95 

 per cent of hydrogen. No further examination was made of the frac- 

 tions collected under atmospheric pressure. Like the Bardsdale oil, 

 part of the distillates between 140° and 220° under 50 mm. turned 

 pink soon after they were collected, and on standing deposited a dark 

 colored oil. 



While the possibility of hydrocarbons poorer in hydrogen, such as con- 

 densed naphteue, is suggested by the low percentage of hydrogen, on 

 account of the very large proportion of aromatic derivatives of benzol 

 contained in Adams' Canon oil, it seems more probable that these results 

 are due to benzol derivatives not wholly removed, especially as the boil- 

 ing points of the double ring naphtenes undoubtedly are much higher. 

 Such a double ring naphtene apparently formed as one of the products 

 by the action of sodium on monochlorheptamethylene boiled in the 

 vicinity of 240°. 



ToRREY Wells Oil. 



The specimen of petroleum from the Torrey wells was much lighter 

 than that from Adams' Caiion ; its specific gravity at 20° was 0.8837. 

 It contained 0.49 per cent of sulphur, and gave 0.38 per cent of nitrogen 

 , by the Kjeldahl method and 1.15 per cent by volume. A combustion 

 gave 86.00 per cent of carbon, and 12.48 per cent of hydrogen; 100 

 grms. distilled under atmospheric pressure gave 11 grms. with a specific 

 gravity 0.7519 below 150°, and 29 grms. specific gravity 0.8226 between 

 150° and 250. In distilling Torrey oil in vacuo, 9860 grms. gave the 



Further distillation of the lower fractions gave, after the fourth dis- 

 tillation, the following weights, with smaller proportions at temperatures 

 between : — 



