( 230 ) 



Let US first con- 

 sider the congelation 

 (see figure). 



The congealing 

 temperature falls in 

 mixtures of 0—31.3 

 mol.pCt. K NOo from 

 206° (melting point 

 of TINO3) to 182° 

 (^If). From these 

 liquids mixed crys- 

 tals are deposited, 



containing more 



TINO3 than the 

 liquid, namely — 20 

 pCt. KNO3 {AD). 

 These are heavier 

 than the liquid. 



Starting from KNO3 

 the congealing tem- 

 perature falls equally 



from 33!J°— 182° 

 (BC) while from the 

 molten mass of 100 — 

 31.3 pCt. K NO3 

 mixed crystals are 

 deposited containing 

 100— 50pCt.KNO3 

 (BE) being therefore 

 richer in K NO3. 

 These crystals are 

 specifically lighter 

 than the molten mass. 

 The congealing 

 both in points of 

 AC and of -BC takes 

 place in such a tem- 

 perature-interval, as 

 comprised between 

 the points of AC 

 and AD or BC and 

 -B^'showins: the same 



