MABERY. — ON THE COMPOSITION OF PETROLEUM. 359 



0.1 58G si-am of the oil gave 0.4951 gram CO2 and 0.2122 gram II2O. 



A determination of its molecular weight corresponded to the formula 

 C28H58. 



I. 1.3337 gram of the solid and 23.73 grams benzol gave a rise of 



0°.362. 

 II. 1.7964 gram of the solid and 21.96 grams benzol gave a rise of 

 0".o3. 



Calculated for FouuJ. 



CjsHjj. I. II. 



394 397 396 



NoNOCOSANE, C29H60, B. P. 346°-34S° (40 mm.). 



At 346°-348° 40 grams collected ; melting point, 62°-63°. It gave 

 on combustion percentages of carbon and hydrogen for the series 



0.1520 gram of the solid gave 0.4752 gram CO2 and 0.2062 gram H2O. 



Calculated for CogH,;,,. Found. 



C 85.28 85.27 



H 14.72 14.87 



Its molecular weight was found to be as follows : 



I. 1.6181 gram of the substance and 23.57 grams benzol gave a rise 

 of 0°.41. 

 II. 1.6236 gram of the substance and 23.99 grams benzol gave a rise 

 of 0° .402. 



Calculated for Found. 



CooHfio. I. TI. 



406 405 408 



That the solid distilling above 350° has the composition of the series 

 CnIl2„+2 is shown by the following combustion : 



