ACTION OF SALTS ON VOLATILE OILS. 145 



tliat one contains a much larger proportion of iron than tb€ 

 other. Thev have besides almost all the same physical and 

 chemical characters; whence I am induced to consider them 

 as forming but one species. In a subsequent paper on the 

 green substance I shall give more at large the reasons, by 

 which I am led to this opinion; and I shall point out the 

 place, which I conceive they ought to occupy in the classifi- 

 cation of minerals. 



XIII. 



Memoir on the reciprocal Action of several Volatile Oils and 

 certain Saline Substances: by Mr. MargueEon, late Apo- 

 thecary-major to the Hutel des Jnvalides*, 



JL Inserted in the 21st vol. of the Annales de Chimle a pa- Object of the 

 per containing some results of the action of cold on volatile ^"^ °^' 

 oils, and an examination of the concretions found in several 

 of these oils. The object of the present is, to make known 

 the reciprocal action of several saline substances with oils of 

 that kind, and to point out the alterations such salts are ca- 

 pable of producing in them. 



Exp, 1. I made a saturated solution of acetite of lead in Solution of 



distilled water at 15° [59° Fahr.], divided this solution ^^^^i'^ o^ '«^«* 



„ . „ ,. , 1.11 1 • . , , with volatile 



equally m four phials, and added to each portion one eighth oils 



of its weiglit of the following volatile oils; namely those of 

 thyme, lavender, rosemary, and sage. I shook each 

 phial, till the oil in it was broken into globules, that the con- 

 tact might be the more intimate. After keeping these mix- 

 tures several months, the following were the results. 



The oil of thyme had undergone no alteration; but the °f thyme, 

 part in contact with the solution contained several whitish 

 bladders, which at the slightest motion separated in films. 

 The oil being afterward filtered differed in no respect from 

 1^hat it was at first. 



The oils of rosemary, lavender, and sage, likewise expe- ^°^^^^^Vt '*- 



» Annales de Chimie, vol. XLVII, p. 46. 



Vol. XX — Ju^^E, ISOS. L nenced 



