257 



pliase. Probably directlj into pliase 1, for at a supply of heal (he 

 same melting point of about 118° shows itself. 



Fig. 3. After the same initial development as in the ease represented 

 by tig. 2 the same deep undeicooling is again followed by the 

 appearance of the solid phase II. Hut now we have to take care 

 that immediately after this phase arises, heat is supplied by streng- 

 thening the heating-currenl, and that to such value that phase II is 

 melted but the arising liquid crystalline phase remains undercooled. Whilst 

 at E its temperature has become constant, we have, in order to 

 hasten the process of congalation, reduced the healing-current, and 

 in result of this the temperature has scarcely fallen a few degrees 

 before under the development of heat the liquid crystalline substance 

 congeals and now at a temperature of 2° below the zero-line. We 

 call this new condition solid phase III. 



Fig. 4 also gives the origin of phase III from the undercooled 



liquid crystalline phase. The heating-current during the preceding cooling 



was chosen in such a way that the formation of phase II was excluded. 



Fig. 5 gives once again the origin of plate III with the exclusion 



of phase II. But where the undercooled liquid crystalline phase in fig. 4 



Fig. 5. 

 was ex-liquid, we have taken it exsolid in fig. 5. Besides this figure 

 also gives the melting of phase III and there the remarkable pheno- 



