Intelligence and Miscella7ieous Articles, 4-77 



elusion that it would have the properties of a fatty acid ; it boils 

 fixedly at 282° Fahr. ; it is volatile without residue. 



When oil of turpentine is treated with nitric alcohol, another 

 substance is obtained which may be considered as a liquid hydrate. 

 After remaining mixed for several years, these substances do not 

 dissolve, and the oil of turpentine is not entirely metamorphosed. On 

 heating the viscid and coloured oil which floats on the nitric alcohol 

 to 428° Fahr., water first comes over, then oil of turpentine, after- 

 wards a peculiar liquid, into the composition of which, judging from 

 the results of analysis, the elements of water enter ; it is probably 

 only impure liquid bihydrate of oil of turpentine ; it yielded by 

 analysis, — 



Carbon 76-4 



Hydrogen 11-6 



Oxygen 12-0 



1000 

 By analogy it ought to be admitted that a liquid terhydrate can- 

 not exist at 292° Fahr. If it be supposed that an oil be present in 

 this product representing a J-quid hydrate, its composition must be, 



C'^o 69-8 



W 11-6 



O* 18-6 



100-0 

 This formula is that of the solid bihydrate of oil of turpentine. 



It appears from the above detailed experiments, that oil of tur- 

 pentine forms with water three very distinct compounds : — 



C20H16, H606 



C^oH'6, H*0* 



C20H16, H'2 02 (Blanchet and Sell). 

 The two first may be converted into each other at pleasure, since a 

 dry vacuum takes away 2 equivalents of water from the terhydrate, 

 and moist air restores 2 equivalents of water to the bihydrate. — 

 Ann. de Ch. et de Phys. Septembre 1849. 



ACTION OF PHOSPHORIC ACID ON THE HYDRATES OF OIL OF 

 TURPENTINE. BY M. H. DEVILLE. 



When the bihydrate or terhydrate of oil of turpentine is treated 

 with anhydrous phosphoric acid, a colourless oil is obtained, which by 

 distillation is separated into two other oils of different volatility : one 

 is tereben, easily recognized by its odour, fluidity and composition. 

 It gave by analysis — 



Experiment. Calculation. (C^H'") 



Carbon 88-1 88-24 



Hydrogen 11-9 11-76 



1000 100-00 



The other oil is viscid, boils at a higher temperature, and is more 

 dense than the above ; it possesses characteristic dichroism, sometimes 

 appearing blue and at other times colourless : it is colophen. 



