574 PROCEEDINGS OP THE AMERICAN ACADEMY. 



276° uuder 760 mm., barometric pressure. In determining the molecu- 

 lar weight of this fraction at the freezing point of benzol, it gave the 

 formula C16H34 : — 



I. 1.1507 grm. of the oil and 35.27 grms. benzol gave a depression 



of 0°71. 



II. 1.1833 grm. of the oil and 35.63 grms. benzol gave a depression 



of 0.715. 



Calculated for Found. 



CicH34. I II. 



226 225.2 227.6 



Determinations of carbon and hydrogen were made in the unpurified 

 distillate (I.), in a portion purified with concentrated suljjhuric acid (II.), 

 and in a third portion purified with fuming sulphuric acid (III.), vvith the 

 following results : — 



I. 0.1477 grm. of the oil gave 0.4600 grm. CO. and 0.1973 grm. HgO. 



II. 0.1454 grm. of the oil gave 0.4522 grm. CO. and 0.1986 grm. H.O. 



III. 0.1454 grm. of the oil gave 0.4516 grm. CO., and 0.1971 grm. H2O. 



The index of this hydrocarbon was found to be 1.4413, from which the 

 molecular refraction was calculated : — 



Calculated for CigHjj. Found. 



75.750 75.555 



Dichlorhexadecane, C16H33CI2. — The chlorine product obtained from 

 hexadecane collected for the larger part at 205°-210°, under 16 mm. 

 Its specific gravity was 1.0314 at 20'\ A determination of chlorine 

 gave a value required for the dichloride : — 



0.1477 grm. of the oil gave 0.1525 grm. AgCl. 



Calculated for CicHjjClj. Found. 



CI 24.61 24.44 



This formula was also confirmed by its molecular weight : — 

 0. 5019 grm. of the oil and 18.21 grms. benzol gave a depression of 0°.457. 



Calculated for CigHsjClj. Found. 



295 295 



