448 Mr Ramage, The Boiling Points of Homologous Compounds. 



It is worthy of remark that the difference in boiling points of 

 two ketones differing by CH 2 is about 41 '0° and this is the dif- 

 ference between the first constants -in the above equations. 



The influence of the oxygen atoms in the compounds given in 

 the two last tables is very marked as it also is in the acids. The 

 curve representing the acids is irregular and it indicates that the 

 boiling points of the lower members are abnormal, due doubtless 

 to the association of their molecules, whilst the boiling points 

 assume a normal value in the higher members of the series. 



