MABERY. — SULPHUR PETROLEUMS. 61 



not be detected, this quantity should be added to the total amount of 

 metaxylol in the ci'ude oil. Even then 0.012 per cent is scarcely more 

 than a trace of this body. As in the similar determinations iu Ohio 

 oil, these results serve to show the very small proportion of the xylols 

 contained in the crude oils. In the distillates 130°-140° of the 

 Canadian oil there were indications of bodies capable of forming nitre 

 products, but much larger quantities of these fractions will be needed 

 for their separation. 



Series C„H2„. 



The fraction 68°- 69° of the twelfth distillation was carefully puri- 

 fied with alcoholic mercuric chloride, nitric acid, sulphuric acid, and 

 distillation with sodium. A combustion then gave the following 

 results : — 



0.1889 gram of the oil gave 0.5784 gram CO2 and 0.2719 gram HgO. 



This fraction therefore consisted essentially of hexane, and it con- 

 tained no appreciable quantity of hexahydrobenzol. 



The fraction 97°-98°, by the action of a mixture of nitric and sul- 

 phuric acids, gave a nitro compound heavier than water, equivalent to 

 10 per cent of the weight taken. The heavy oil turned red with sodic 

 hydrate, and partially dissolved, reprecipitating with acids. By 

 reduction with tin and hydrochloric acid, a substance with the proper- 

 ties of an amido compound was formed. It distilled with steam, was 

 soluble in acids, and was precipitated from the acid solution by sodic 

 hydrate. The prolonged fractional separation excluded benzol, and 

 furthermore the amido derivative gave no reaction with furfurol. In 

 its behavior toward sodic hydrate the nitro compound resembled the 

 unsaturated nitro compounds of the series C„H9„, but the quantity of 

 the distillate was not sufficient for complete verification. Another 

 portion of the same fraction was heated during several hours with 

 dilute nitric acid, the solution neutralized with sodic hydrate, and 

 evaporated to dryness. A portion dissolved in water gave, with ferric 

 chloride, the characteristic color for acetic acid, and more of the sodium 

 salt, decomposed with hydrochloric acid and extracted with ether, gave 

 colorless prismatic crj^stals resembling succinic acid. 



In a distillate 95°-100°, from the Caucasus petroleum, Beilstein and 



