EXPERIMENTAL METHODS. 13 



TABLE 1. Experimental runs made and material used in each. 



DATA OBTAINED. 



A typical data sheet which gives the records obtained in one dis- 

 tillation is shown in Table 2. The distillate was caught in 1-liter 

 fractions and the time and pressure were recorded with every frac- 

 tion. The amount of oil in each liter of distillate was determined 

 as accurately as possible in the original receiver a 1 -liter cylinder 

 graduated to 10 cubic centimeters; the oil was then separated from 

 the water in a separatory funnel and its specific gravity determined. 

 When the amount of oil in a single fraction was so small that the 



