192 Miscellanies, 



The residuary gas contained, 



Carbonic acid, - _ _ - _ 90.7 



Hydrogen, - - - - - - 26.4 



Azote, - - - - - - 17.8 



Oxygen, - - - - - - 3.6 



138.5 

 4. JVut Oil. — In seven months it absorbed but 3 c. c. : in six 

 weeks following, it increased to 7 c. c. 5 in the next week it sudden- 

 ly absorbed 27 c. c. per day, under a temperature of 73° F, It ab- 

 sorbed in the whole 578 c. c. of oxygen, and was almost entirely 

 discolored by the operation, and was reduced to so gelatinous a con- 

 dition as not to stain paper. 



It thus appears that the drying oils form less carbonic acid than ' 

 the non-siccative oils ; — olive and almond produce one volume of 

 acid gas, for the fourth or fifth of the oxygen absorbed, — and the 

 nut and hemp, one volume for the seventh of the oxygen. 



Volatile Oils : 1. I^avender. — The same quantity of these as 

 of the former were similarly exposed. The total absorption of la- 

 vender oil 443.5 c. c. The remaining gas was. 



Carbonic acid, _____ 82.6 



Oxygen, - - - - - - 51.0 



Azote, 24.5 



Hydrogen, - - - - - - 6.9 



165 

 The oil turned yellow and preserved its fluidity nearly unimpaired. 



2. Citron Oil. — Quantity of gas absorbed, 528 c. c. in the course 

 of about one year. It was colored brownish yellow. 



Residue of air, Carbonic acid, - - - 61.9 



Azote, - - - - - 25.2 



Oxygen, - - - - 16.8 



Hydrogen, _ _ _ _ 10.8 



114.6 



3. Turpentine. — Quantity absorbed in a year, 440 c. c, and in 

 thirty three months, 475 ; color deep brownish yellow. 



Residual air. Carbonic acid, - - - - 66. 

 Hydrogen, - - - - 20.5 

 Azote, - - - - - 13.8 

 Oxygen, - - - - - ^ 



100.6 



