Essential Oil of Sage. 345 



A portion of this terpcnOj when treated with bromine, as 

 described in paragraph 0, reacted in a manner very similar 

 to that ah'eady detailed in the case of the tcrpene of lower 

 boiling'-point ; only, on distilling the brominated liquid, it was 

 very readily and almost entirely split np into hydrobromic 

 acid and cymeno. 



16. That portion of the original oil which, upon fractiona- 

 tion, boiled between 198° and 203^^, was a nearly colourless 

 heavy liquid, having a very strong odour of sage. It did not 

 become sensibly darker on exposure to the air. 



For this liquid, which represents the oxidized liquid con- 

 stituent of sage-oil, we propose the name of salviol. We 

 have analyzed salviol, and have also made a determination of 

 its vapour-density. 



I. 0-1G64 grm. gave 0*48 grm. CO2 and 0-162 grm. H2 0. 

 ir. 0-130 „ 0-374 „ CO2 „ 0-124 " lis 0. 



Calculated Found. 



for C,o Hjc 0. I -"- . 



I. 11. Mean. 



Carbon 78-94 78-69 78-46 78-57 



Hydrogen 10-53 10-81 10-59 10-70 



Oxygen 10-53 (by diff.) 10-50 10-95 10-73 



Vapour-density determination. 

 Height of barometer =755 millims. 

 Temperature of air = 17°. 



Height of mercury column in barometer-tube =492 millims. 

 Temperature of vapour =185°. 

 Tension of mercury vapour at 185° =12 millims. 

 Weight of mercury required to occupy space formerly 



occupied by vapour =788*1 grams. 

 Temperature of mercury = 17°. 

 Hence, volume of vapour =58-16 cubic centims. 

 Weight of liquid =0-0786 gram. 

 Weight of volume of hydrogen equal to volume of vapour 



under same conditions of temperature and pressure = 



0-00107 gram. 



Hence -^ = ^^.^..„ =73*46. Calculated =76. 



A small quantity of resinous matter remained in the little 

 bottle at the conclusion of the experiment. The weight of 

 this non-volatile residue was found to be 0-0014 gram. 

 The number given above as representing the weight of liquid 

 taken is the difference between the actual amount weighed 

 out and the weight of the non-volatile residue. 



