76 PROCEEDINGS OP THE AMERICAN ACADEMY 



Analysis 2. — 0.1700 grrn. of the substance gave 0.5256 of car- 

 bonic acid, and 0.2412 of water. 



100.00 100.086 



Determination of Vapor Density. 

 Temperature of balance 16° 



Temperature of oil bath 129° 



Height of barometer 762 mm. at 8° 



Increment of balloon 0.8829 



Capacity of balloon 262 c.c. 



Density of vapor found 3.038 



Theory € 6 H 14 = 4 vols. 2.9737 



6. Heptyl Hydride = C 7 H 16 . 



Specific gravity 0.7183 at 0° ; 0.7065 at 15°. 



Specific gravity after treatment with nitric acid 0.7033. 



Determination of Boiling-point. 



Observed temperature at commencement of distillation 88°. 7 



10 minutes later 88°. 9 



89° 

 89°. 1 

 89°. 3 

 89°. 7 



n 

 a 



a 

 a 



having distilled quite to dryness. Applying the usual corrections 

 to the number 89°, the corrected boiling-point is found to be 90°. 4. 

 After treatment of a portion of this body with nitric acid, its cor- 

 rected boiling-point was 90°. 53. This experiment was made, how- 

 ever, on a very small quantity of liquid, and would hardly justify 

 the conclusion that the acid had really effected a change of the 

 boiling-point. 



Analysis 1. — 0.2268 grm. of the substance gave 0.7031 of car- 

 bonic acid, and 0.3165 of water. 



Calculated. Found 



Carbon € 7 84 84.00 84.55 



Hydrogen H 16 16 16.00 15.51 



100.00 100.06 



