( 464 ) 



poiients. Examples will be found in the componnds of NH, or amines 

 with volatile acids as HCl, HBr, H^S, HON or organic acids as formic 

 acid, acetic acid, in chloral hydrate or alcoholate, etc. 



Fl^.5 



P 



When the compound becomes less dissociated, tig. 3 will assume 

 more the character of tig. 2. To this belongs, perhaps methvlamine 

 hydrochloride. As the dissociation becomes greater and the volatility 

 of B differs more from A, the i)oint //, wiiere L = (r, will be fur- 

 ther removed from F. In the case of amine salts of organic acids 

 it is already known lijat the li(|uid with a constant boiling point 

 lies much closer to the acid-side than the compound. 



If the volatility of B decreases very much, fig. 5 may form. 



If the line //J/ lies strongly to the side of 7i the case might happen 

 that the point H did not occur on the three-phase line of the com- 

 pound, but on that of the component B. in fig. 8 and 5 branch 3 

 is represented by the three-phase line ALir as well as by BLG. 

 In the case mentioned, the Une BLG starting from B would at 

 first represent branch 3 but after ()assing the point L = G it would 

 represent branch 1 either Ih or later even \a. These branches then 

 join on branch 3, the three-phase line of the compound. Of this, no 

 instance is as yet known. In the systems HCl, HBr, HJ and H^O 

 the ice line runs to very low temperatures, aiul therefore to very 

 high concentration of HCl etc., but the line HM when ruiming lo lower 

 temperatures also runs to a higher acid concentration, so that according 

 to Pickering's data on the coexisting liquids the minimum in HCl — H^O 

 would fall on the three-phase line of the third hydrate, in HJ — H^O 

 on that of the fourth hydrate (l)()tli on the side of the solutions 

 richer m water) in HBr — H,0 even just before the melting point 



