SPONTANEOUS CRYSTALLISATION OF MONOCHLOHACETIC ACID, ETC. 373 



turve, corresponding to mixtures containing excess of monochloracetic acid, spontaneous 

 (crystallisation took place at different temperatures. From what has now been 

 ascertained with regard to monochloracetic acid it might safely be predicted that 



a Solubility 



ft Solubility 

 y Solubil 



curve 

 curve 



cur 



rsolubilit 1 



90 



100 



20 30 40 50 60 70 80 



Percentage of Naphthalene in Mixture. 



these different temperatures of spontaneous crystallisation correspond to the various 

 modifications of the acid. This prediction has been verified by a long series of 

 experiments on the temperatures of spontaneous crystallisation of the various mixtures 



