MABERY AND HUDSON. — AMERICAN PETROLEUM. 109 



on a horizontal support. By a suitable adjustment of side tubes, stop- 

 cocks and adapters, any number of distillation flasks may be introduced 

 into the train, ami regulated by the single stopcock. As many as fifteen 

 distillations collecting in single degree fractions have been in simultane- 

 ous operation with no interruption incident to changes of flasks or collec- 

 tion of distillates. It is quite impossible, in Cleveland, to carry on a 

 course of distillations extending through several weeks without some 

 form of tension regulator, on account of sudden and extreme changes in 

 the barometric pressure, ocasionally equivalent to 25 mm. within a few 

 hours. 



Under 760 mm. and with the thermometer wholly in the vapor, chlor- 

 pentane distilled completely between 1)6° and 97°, for the most part at 

 9 6°. 5. From a distillate below 30°, Pelouze and Caliours obtained a 

 butylchloride, as already mentioned, which boiled at 98°-103°. 



The purity of our product was shown by analysis : — 



I. 0.1205 gram of the oil gave 0.2479 gram CO2, and 0.1139 gram 

 ILO. 

 II. 0.2166 gram of the oil gave 0.2952 gram AgCI. 

 III. 0.2942 gram of the oil gave 0.4031 gram AgCl. 



Calculated for Found. 



C5H„ci. I. II. rn. 



C 56.33 56.13 



H 10.33 10.51 



CI 33.33 33.69 33.88 



A determination of the specific gravity of this chlorpentane at 20° 

 gave 0.8750. Its vapor density by the Hofmann method was found to 

 have the following value : — 



0.1291 gram of the oil gave 72.6 c.c. of vapor at 100°, and under a 

 tension of 384 mm. 



Calculated for CgHnCl. Found. 



3.68 3.72 



In forming isopentyl acetate, the purified chloride was heated 48 

 hours to 150°-160° with potassic acetate and glacial acetic acid. When 

 washed, dried, and well fractioned, a small quantity collected at 134°- 

 135° (760 mm.), which is somewhat lower than tlie boiling point of 

 isoamyl acetate, 138°. 6. The amount of our material was not sufficient 

 to raise its boiling point, but it gave the required percentages of carbon 

 and hydrogen. 



