Intelligence and Miscellaneous Articles. 537 



lization evolves this feeble light. Moreover, the quantity of dilute 

 muriatic acid in the mixture above-described is not sufficient to dis- 

 solve all the arsenious acid, and there remains, therefore, a small 

 portion in the vitreous state. 



But still all the appearances of light which have been observed 

 cannot be explained on the principle of a new arrangement or forma- 

 tion, and I myself hold this hypothesis to be one which requires the 

 evidence of more facts to establish its probability. Thus, Berzelius 

 observed phosphorescence during the crystallization of fluoride of so- 

 dium out of a solution which held the same salt already in solution. 



HYDRATE OF OIL OF TURPENTINE. 



MM. Dumas and Peligot state that they received from M. Julien 

 Fontenelle some well-defined crystals collected from oil of turpen- 

 time : 0-287 of these, submitted to analysis, yielded 0295 of water 

 and 0662 of carbonic acid, which indicate : 



Carbon 638 



Hydrogen 1 1*4 



Oxygen 24-8 100-0 



M. Bonastre had observed prismatic crystals resembling the pre- 

 ceding in the essence de basilic {Ocymum basilicum); of these 0*285 

 yielded 0*297 of water and 0*657 of carbonic acid, or 



Carbon 63-8 



Hydrogen 11*5 



Oxygen 24*7 100-0 



Lastly, on examining the oils in the laboratory at the Jardin des 

 Plantes, a bottle of oil of the Cardamomum minus was found in 

 which there were numerous colourless prismatic crystals like the 

 foregoing. They were purified by pressure, and 0-213 of them 

 gave 0*493 of carbonic acid and 0*220 of water, or 



Carbon 64- 



Hydrogen 1 1 *4 



Oxygen 24*6 1000 



These numbers nearly coincide with those which give the fol- 

 lowing formula : 



C 40 1530-4 63*6 



H" 2750 11-4 



0« 600-0 25-0 



2405-4 100-0 



This formula may be explained by C 40 H 3 * + H'« 0\ 

 If, as the authors believe, these three substances are identical, 

 the hydrate which constitutes them ought to be found in a multi- 

 tude of cases. If they are merely isomeric, the study of them 

 would require more of them than the authors possessed ; their ob- 

 ject in publishing these analyses is to call the attention of chemists 

 to a product which is but little known, but of considerable in- 

 terest. — Ann. de Chim. et de Phys., tome lvii. p. 334. 



Third Series. Vol.7. No. 43. Supplement, 1835. 3 X 



