DISTILLATION OF SPERMACETI. 249 



of hydrogen, and its physical properties and reactions are the 

 same as adipinic acid. I consider it as such. 



None of the other acids afforded by the oxidation of sperma- 

 ceti have been obtained in a state of sufficient purity to be 

 examined. There is, however, one among them whose copper 

 and zinc salts are more soluble in cold than in warm water, 

 and if a solution of either of them be heated a precipitate is 

 formed, which redissolves upon cooling. This phenomenon is 

 most striking in the zinc-salt. Those portions of the exami- 

 nation of this subject that are as yet incomplete I propose 

 finishing at some future time. 



