30 E. DIVERS AND M. KAWAKITA 



Products of destructive distillation of bird-lime. 



These have been already enumerated, so far as their nature iä 

 known to us, and the result of analysis of the pahnitic acid hns just 

 been tabulated. The principal hydrocarbon, distilling next after the 

 palmitic acid, was prepared from the middle portion of the distillate, 

 by treating it with hot spirit so as to leave about half undis- 

 solved. This was then washed with cold spirit. The hydrocarbon 

 thus left Avas a thick oil, slightly yellow, but free from fluorescence. 

 On analysis, it gave numbers agreeing with the formula, C2JI41: — 



Found Calculated 

 Carbon 87.59 87.64 



Hydrogen 12.49 12.36 



100.08 100.00 



Apparently the same body is obtained by distilling mochylic alcohol 

 at the ordinary atmospheric pressure. The decomposition of the 

 main constituent of bird-lime by heat may therefore be thus re- 

 presented: — 



Mocbyl palmitate. 



C42 H76 O2 = CjG H^j + C16 H32 O2 

 and the decomposition of mochylic alcohol by — 



CgG H^Q = Cog H^i -f H2 . 



The last fractions of the distillate consisted of hydrocarbons 

 yielding nearly 91 per cent, of carbon. No attempt was made to 

 isolate the caoutchouc hydrocarbons present, no doubt, in the mixture. 



Constitution of bird-lime. 

 Bird-lime is closely allied to the waxes, and consists principally 

 of mochjl and ilicijl pahnitatcs, C^o H/g Oo and C33 Hya 0, . 



