MABERY. — SULPHUR PETROLEUMS. 19 



The alkaline solution of the sulphur from the distillate 115°-250'^ 

 gave 0.1135 gram of baric sulphate, corresponding to 0.015G gram of 

 sulphur. From the alkaline solution of the sulphur absorbed from the 

 fraction 250°-300°, 0.694G gram of baric sulphate was obtained, cor- 

 responding to 0.0958 gram of sulphur. A determination of sulphur in 

 the distillate 115°-250° gave 0.55 percent; in the distillate 250*^- 

 300°, 0.51 per cent; and in the residue above 300°, 0.60 per cent. 

 Since the weight of the distillate collected at 115°-250° was 20.55 

 grams, the weight at 250°-300°, 5.1 grams, and the weight of the 

 residue above 300°, 74.35 grams, the total weight of sulphur accounted 

 for in these determinations was 0.7166 gram, leaving 0.27 gram 

 which must have escaped in ways not determined. 



In comparing the quantities of the distillates from Ohio oil, and 

 their specific gravities, with those obtained by MarkownikofFand Oglo- 

 blin * in the Apcheron oil with a specific gravity at 17° of 0.882, and 

 those given by Bolley from Pennsylvania petroleum with a specific 

 gravity of 0.816, it is evident that the properties of Ohio petroleum 

 place it between the Caucasus and Pennsylvania oils. 



The Caucasus oil began to distil at 120° in the vajDor, and 180° in 

 the liquid. 



While the temperatures at which the Ohio oil was collected are 

 slightly different from the others, they are sufficiently close for com- 

 parison. 



Kramer f has compared the quantities of distillates obtained from 

 crude petroleum of other fields : — 



* Ber. flor deutscli. cliem. Gesellsch , 1883, p. 1873. 

 t Chem. Centralb., 1887, p. 290. 



