l^^ ACTIOS OF SALTS ON VOLATILE OILS. 



fender, and riftnced no alteration; and no flocks formed in them, as in 

 **^^' the oil of thyme. I filtered these oils, as I did the preced- 



ing, and assured myself, that they had not been altered by 

 the solution of acetite of lead, which remained very clear. 

 Into each of these oils I dropped a few drops of sulphuret 

 of potash, which occasioned no precipitate and produced no 

 coloun 

 Sulphate of Exp. 2. I mixed eight parts of a cold saturated solution 



^ils'onaveti- ^^ sulphate of alumiae with one part of the volatile oils of 

 der, sage, hys- lavender, sage, hyssop, and rosemary, each separately. 

 sop, and rose- rpj^^gg fixtures having been kept four months in flint glass 

 phials with ground stopples, neither the oils nor the solution 

 of alum had undergone any change. 



Muriate of Exp. 3. I mixed eight parts of solution of muriate of 



lime with oil ,, • . , , f i i -i -i /• i 



of the vuine- "me with One part or the volatile oil ot the vulnerary plants 



rary plants. [^ ^ phial, and k^p't the mixture for a month, shaking it nov.- 

 and then, without perceiving the slightest alteration. In 

 this state I added liquid potash, to decompose the calcare- 

 ous muriate; but I merely found, that the oil had evidently 

 lost some of its colour, and become whiter. 

 Oil of lemons £^.p^ 4, Volatile oil of lemons, expressed from the 

 and sal ammo- . , , . ■ j -xi, 1 ^- c ■, ■ 1 



ni^c. nnd, being mixed with a somtion ot sal ammonia, and 



kept for a month, shaking it frequently, underwent no 

 change. 

 Hypcroximu- Exp. 5. Into five phials I put a solution of superoxi- 

 with oils of genized muriate of potash, made in distilled water at a tern- 

 thyme, laven- perature of about 15° [59° F.]. In one I added an eighth 

 mint lemons P^'"'^ ^^ ^^^ ^^ thyme; in the second, an eighth of oil of 

 and cloves. lavender; in the third, an eighth of oil of peppermint; in 

 • the fourth, an eighth of oil of lemons; in the fifth, an 

 eighth of oil of cloves. I put the bottles into a place se- 

 cluded from the light, and kept them thus a month, shak-~ 

 ing them once every day. Neither the oils nor the solution 

 of the salt experienced any alteration. I then placed the 

 five phials in a water bath, which I heated so as to make the 

 water boil for a moment. These oils retained their colour, 

 smell, fluidity, and transparency ; and all of them their pro- 

 - perty of floating on water, except the oil of cloves, which 

 sunk in it as usual. I separated each of the oils from the 

 saline solution, evaporated each portion of the solution 



separately, 



