Intelligence and Miscellaneous Articles, 405 



r to 



3rd. Rdtinnapthe is a very light and volatile fluid ; its composi- 

 tion, determined by the density of its vapour, may be represented 

 by O 8 H 1(3 . This product, M. Pelletier observes, is at least isomeric 

 with one carburetted hydrogen, which is still hypothetical, but which 

 appears to play a great part in the benzoic compounds, if indeed it 

 be not itself this carburetted hydrogen j it gives rise to a series of 

 new compounds. 



4th. Retingle is a new sesquicarburet of hydrogen, which may be 

 represented by the formula C 3(j , H 34 ,H 24 [?] ; it is susceptible of con- 

 version by the action of chlorine, bromine, and nitric acid, into com- 

 pounds which exhibit a series of new combinations. 



5th. Retinole is a new bicarburet of hydrogen, the formula of 

 which is C G4 H 32 ; it differs from the bicarburetted hydrogen of Fara- 

 day C- 4 H 1? , both in its constitution and its chemical properties. 



6th. M&anaphtalene is anew substance, which differs from naph- 

 talene in its properties, but isomeric with its composition. It is 

 remarkable for its splendour and beauty, its chemical indifference, 

 in which property it resembles paraffine, from which it differs totally 

 in its properties and composition. 



The substances whose properties and composition have now been 

 briefly stated, result from the sudden application of a red heat to 

 resin. M. Pelletier states, that in a second memoir he will examine 

 the properties of the products obtained from resin at lower tempe- 

 ratures. — L'Institut, June 1837. 



DOUBLE SALT OF CODEIA AND MORPHIA. 



M. Kcene, of Brussels, has published a memoir entitled, New Ob- 

 servations on a double Salt of' Codeia and Morphia ; in this he has 

 arrived at the following conclusions : 



1st. Codeia and morphia form, with muriatic acid, a salt which 

 is undecomposable by ammonia. 



2nd. Ammonia does not enter into the composition of this double 

 salt. 



3rd. The quantity of morphia in the double salt is less than that 

 of the codeia, and according to one experiment only, as 1 to 3. 



4th. Muriate of codeia and morphia in solution with muriate of 

 ammonia crystallizes first, and the latter remains in the mother 

 water. 



5th. When heated, ammonia entirely decomposes the double sul- 

 phate of the two vegetable alkalis ; but the combination remains 

 stable, if during the evaporation, the ammonia is not in too great 

 excess.— Journal de Chimie Medicate, Juin 1837. 



CARBURETS OF HYDROGEN. 



M. Laurent distilled 8 to 10 pints of the oil of bituminous schistus, 

 and received the product in separate portions. He attempted, but 

 in vain, by repeatedly rectifying the same portion, to obtain an oil 

 the boiling point of which should be nearly constant} he procured 

 a dozen different oils, the boiling heat of which varied from 9 

 to 10 degrees from the beginning to the end. This circumstance 

 indicates the presence of several different bodies in the oil of the 



