'566 



Transactions of the American Institute. 



more vibrating segments having heated nodes, on account of the 

 rapid moving and consequently cooled portion of the wire allowing 

 more of the electric current to pass. The wire had the appeai-ance 

 of luminous spindles intensely bright at the point, and fading into 

 darkness at the base. 



AETinCIAL FEUIT ESSENCES. 



The following table, from Dinglet'^s Polytechnic Journal, shows 

 the number of parts of each compound to be added to one hun- 

 dred parts of alcohol, to make fifteen different artificial essences. 

 Glj'^cerine is found in nearly all these mixtures, and seems to blend 

 the flavors of the several ingredients. It will be observed that a 

 majority of these ingredients are combinations of radicals of the 

 alcoholic series with the fiitty acids. The last four named acids 

 are used in the form of alcoholic solutions saturated in the cold: 



Glycerine (Echarlilt) 



Chloroform (Arlid) 



Nitric Ether (Echalnit) 



Aldehyde (Artachel) 



Acetate of Ethyl. (Echal-artachalt) 



Formiate of Ethyl. (Echal-artalt) 



Butyrate of Ethyl. (Echal-artichalt) 



Valerianate of Ethyl. {Echal-artochalt) . . . . 



Benzoete of Ethyl. (Echal-ecurlet) 



•Enanthylate of Ethyl. (Echal-arteachalt) . . 



Sebacic Ether {Echalem-eicherot) 



Salicylate of Methyl. (Oil of Wintergreen). 



Acetate of Amyl. (Uchal-artachalt) 



Butyrate of Amyl. (Uchal-artichalt) 



Valerianate of Amyl. (Uchal-artochalt) . . .. 



Essence of Orange 



Tartaric Acid, Sol. (Thel-orleat) 



Oxalic Acid, Sol. (Thel-erot) 



Succinic Acid, Sol. (Thel-echerot) 



Benzoic Acid, Sol. (Thal-ecurlat) 



2 



:: 



610 



5 6 



51 1 

 1 

 2 2 



10 



< o 



10 



10 





. 4 



ss 



21 3 



11 1 



l|-- 



2! 1 



ii! 



4 5 

 5... 



10 



10 



DEODORIZED INDIA RUBBER. 

 Mr. T. Bourne exhibited specimens of deodorized caoutchouc to 

 the meeting. The process by which they were freed from the 

 offensive smell, consists in sprinkling the rubber, raised to a heat 

 of about 60 degrees Fahr., with powdered charcoal. The exhibi- 

 tor claimed that a diaphram of this kind of rubber, inserted in a 

 lager-beer keg, wall keep the beer fresh, by preventing contact with 

 common air, until it is all consumed. Also, that the rubber will 

 resist the action of the vapors arising in petroleum barrels. 



