580 PROCEEDINGS OF THE AMERICAN ACADEMY. 



I. 1.1039 grm. of the oil and 39.7462 grms. benzol gave a depression 

 of 0°.575. 

 11. 1.1418 grm. of the oil and 36.2175 grms. benzol gave a depression 

 of 0°.o05. 



Calculated for Found. 



C,gH,o. I. II. 



268 269.5 268 



Determinations of carbon and hydrogen gave values for the series 



T. 0.1530 grm. of the oil gave 0.4771 grm. CO2 and 0.1994 grm. HoO. 

 II. 0.1591 grm. of the oil gave 0.4976 grm. CO2 and 0.2132 grm. H2O. 



Analysis I. was made of the oil before purification, and Analysis II. 

 afterward. 



A determination of the index of refraction gave 1.4522, which cor- 

 responds to the following molecular refraction : — 



Calculated for Gyjlltf). Found. 



89.55 88.68 



The results on the composition of the distillate 2 10° -21 2° were ob- 

 tained on the purified distillate without cooling to separate the solid 

 hydrocarbon. On cooling a portion of this distillate to —10°, filtering 

 cold and pressing the solid, 5 grams of the solid hydrocarbon, and 30 

 grams of the liquid hydrocarbon were obtained; the solid hydrocarbon, 

 therefore, formed a small part of the original distillate. The specific 

 gravity of the filtered oil was 0.8208 at 20°. The specific gravity of the 

 distillate before cooling as shown above was 0.8122 at 20°. 



After crystallization from ether and alcohol, the specific gravity of 

 the solid hydrocarbon was 0.7725, |^o, and 0.7781 at 5^0. 



A determination of its molecular weight gave a value required for the 

 hydrocarbon CioHio- 



1.4011 grm. of the solid and 26.66 grms. benzol gave a rise of 0°. 496. 



Calculated for CigH^o. Found. 



268 271.6 



