﻿Manchester Memoirs, Vol. xlix. (1905), No. 14. 7 



From these data it would appear probable that the 

 substance is a saturated hydrocarbon of the paraffin series, 

 and from its melting point and appearance it might be 

 inferred that it is probably identical with the Heptacosane 

 C 27 H 5 6 (m.p. 59*5°) which Schwalb* isolated from bees' 

 wax. 



The filtrate from this characteristic crystalline sub- 

 stance showed a sp. gr. of 1*056 at 15 . It was subjected 

 to distillation in a partial vacuum (80 mm. pressure). It 

 began to distil at 70 , and the temperature gradually rose 

 to 285 °, when it went up suddenly to 305 °. At this point 

 the distillate began to thicken, the thermometer slowly 

 rising to 340 , and then suddenly to 400 , when practically 

 all had passed over, and the operation was stopped. The 

 resulting thick, brown oil, amounting to 18*5 grms., was 

 soluble in alcohol, ether, benzene, and glacial acetic acid. 



The second part of the distillate was not sufficient in 

 amount to allow of a more careful examination. Its 

 solution in benzene and in alcohol shows a characteristic 

 intense green fluorescence. From the alcoholic solution I 

 succeeded in isolating a very small quantity of beautiful, 

 sulphur yellow crystals. 



It is evident from the behaviour of the benzene ex- 

 tract in distilling that it consists mainly of hydrocarbons 

 of high boiling points. As these range in the first 

 distillate from 170 to 400° (at 80 mm.), it would further 

 appear probable that they represent a complex mixture. 



Soot after extraction. After extracting successively 

 with acid alkali and benzene, the soot, though much darker 

 than before extraction, still showed a brownish-black 

 colour, which is possibly due to the considerable amount 

 of ash which it contains (the original sample contained 

 19 % of a red-brown ash). In this condition it is extremely 



* Lied. Ann., 235, p. 117. 



