EXAMINATION OF A NAITITIIA FROM LIME-SOAP. 



IS 



at 35°-41°, a heap was obtained at 64£°-66£ 



lily estimated, amo 



e< 



1 



about 250 



This heap was well defined, the quantities obtained for each degree 



above it diminishing rapidly towards 

 away to almost nothing at 63. 







■liile 



the other side the fractions fi 



At 70°-71° was another well-marked though smaller 



elevation, amounting to about 180 c. c. This diminished rapidly on cither hand, but 

 especially on the side towards 80.° The product at 70°-71° had an odor like petro- 



leum, quite unlike the odor of acetone, possessed by the fraction 92°-93,° or the odor 

 of the fraction 64£°-65|°, which though hardly to be compared with that of acetone 

 still reminded one of the latter. Each of the fractions between 64 £° and 72 was 

 separately treated with diluted sulphuric acid and subsequently boiled over sodium. 

 The sodium was at first acted upon to a considerable extent, even in the cold, but after 

 three or four redistillations this action ceased almost entirely. The dark sulphuric acid 



liquor from 70°-71° evolved no such ethereal odor as did that from 92°-93°. 



The purified fractions between 64£° and 72,° were now all redistilled some eighteen 



times through Warren's hot condenser, new fractions being taken off for every half 

 degree. The thermometer employed was graduated to fifths of a degree, and the most 

 scrupulous care was constantly exercised, in the belief that the two heaps might be 

 made to coalesce into one. But the longer the distillatory process was conducted so 



much the more clearly did the two heaps stand out, their summits being respectively 

 at 64°-65° and 67°-68°. About one-half of the material taken for purification 

 wasted away during the operations here recorded. 

 Allowing for the elevating influence of the second (68°) body, we estimate the true 



(corrected) boiling point of the first, when pure, to be 65°. 



On combustion, 0.1896 grm. of the purified fraction 65£°-66 c 

 water and 0.5921 grm. carbonic acid ; another portion, not weighed 

 water, and 0.7085 grm. carbonic acid, or 



ga\ 



0.254 grm. 

 0.2978 grm. 



Found. 



Theory 



i. 



ii. 



Carbon 



85.18 85.37 



Hydrogen 14.87 14.63 



C12 85.71 

 H12 14.29 



100.05 100.00 



100.00 



f 



A dete 



of the vapor density of the h} 



boiling 



65^-66°. af- 



forded the following result 



Temperature of balance, 

 Temperature of oil-bath, . 

 Excess of weight of balloon, 



18' 

 128° 



0.2965 



