( 17R ) 

 From the skotcli the following conclusions may bo drawn : 



Case I. The substance a or ft is heated tor a considerable time 

 after melting at a temperature situated ((hove that of point F. Then 

 the liquid is sloidy cooled. 



No matter what the heating-temperature was, and whether we 

 started from « or from /?, the congelation now begins in point // '), 

 deposing solid «, until it is completed in C', deposing solid « + ft. 



Case II. The substance « is heated for a cousideralde time after 

 melting at a temperature situated heloiv F^ being afterwards slowh/ 

 cooled. 



The first melting poiut is now variable, always lying above //, 

 and that the more so in proportion to the heating having taken 

 place to a lower temperature. The first deposit is solid a, tiie con- 

 gealing ends in C. 



Starting from ft, and in proportion to the heating having been 

 lower than ^, the first congealing point will be at first below ƒ/, 

 deposing a, then falling to C, then rising along CB deposing ft. 

 C remains the final congealing point. 



Case III. The substance a or ft is heated for a considerable 

 time after melting at a temperature above F, but afterwards quicldy 

 cooled. 



The first congealing point is situated to the right of //, no matter 

 whether « or ft be the st;irting point, and this the more so in 

 proportion to the heating having been greater and the cooling quicker. 



The starting point of the congelation may even move past 6', 

 so that ft becomes the sul)stance first deposed, provided the line 

 FG running sufficiently to the I'ight. C remains tiie final con- 

 gealing point. 



Case IV. The su!)stance u or ft is heated for a considerable 

 time after melting at a temperature beloio i'" being afterwards ^^^/c/V// 

 cooled. 



The results both for (c and ft are the same as in Case II. 



Case V. If the heating does not last long enough to reach the 

 final equilibrium in the liquid state, the same result as in Case II 



') Tlie point II lies vertically luuler F, or better jtill iiiuler tlie ])oiiit of F E 

 wiiieli a vertieal taiiyeut may be drawn to (bis curve. 



