574 PROCEEDINGS OF THE AMERICAN ACADEMY. 



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

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

 formula C 16 H 34 : — 



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. 



C 1( ,H.34- 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 sulphuric acid (II.), 

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

 following results : — 



I. 0.1477 grm. of the oil gave 0.4600 grm. C0 2 and 0.1973 grm. H 2 0. 



II. 0.1454 grm. of the oil gave 0.4522 grm. C0 2 and 0.1986 grm. H 2 0. 



III. 0.1454 grm. of the oil gave 0.4516 grm. C0 2 and 0.1971 grm. H 2 0. 



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

 molecular refraction was calculated : — 



Calculated for C ir ,H M . Found. 



75.750 75.555 



Dichlorhexadecane, C 16 H 33 C1 2 . — 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 C 10 H 3 ,C1 2 . 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 C 16 H 3 ,Clj. Found. 



295 295 



