Young — Boiling -Points, Sfc. of Homologous Compounds. 95 



Table I. 



Boiling-points of Normal Paraffins. 



In the year 1905 I pointed out (" Journ. de Chimie physique," iii., 245, and 

 "Phil. Mag.," series 6, ix., 1) that the rise of boiling-point due to a CH 2 group 

 may be regarded as a function of the absolute temperature, and I showed that 

 the formula 



144-86 



A = 



0-0148VT 



T 



(where A is the difference between the boiling-point T of any normal paraffin 

 and that of its next higher homologue) is applicable, not only to the series of 

 normal paraffins, but to other series of organic compounds, with the exception 

 of the lower members of such series. It is, of course, not applicable to 

 substances the molecules of which are associated; but in any series of 



«j2 



