Spontaneous Crystallization of Supercooled Liquids. 93 



7. Melted at 50°. Thermostat, 

 20°-5. 



8- Heated the whole batch of tubes 

 to 95°-100° for 5 hours. In 

 thermostat at 32°. 



Time 



Number of 



[Cf. experi 





in hours. 



crystallizations. 



ments 1 5.] 



2 



36 



Time 



Number of 



26 



45 



in hours. 



crystallizations 



150 



48 



48 



13 



300 



51 



216 



18 







792 



24 







1050 



24 



9. Tubes opened and exposed to 

 the air in a cupboard for 

 4 days. Re-sealed 36 tubes. 

 Melted at.50°= Temp, of 

 thermostat, 35°. 



Number of 

 crystallizations 



Time ca]c. for 70 tubes 



in hours. (i. e. actual 



number X 70/36). 



05 19 



8 35 



23 39 



70 49 



10- Melted at 50°. Temp, of 

 thermostat, 28° "8. 



Time 

 in hours. 



6 

 20 



Number of 



crystallizations 



calc. for 70 tubes. 



5(5 



63 



Table II. 



Phenol. 41 tubes. (12 expts. made.) The following are 

 typical :— 



1. Melted at 50°. % Melted at 50°. 



Temp, of thermostat, 18°0. None crystallized in 15 days at 25°. 



Time Number of 



in minutes. crystallizations. 



10 3 



25 14 



40 20 



230 32 



1200 38 



3. Melted at 50°. 

 Temp, of thermostat, 20 o- 0. 



4. Tubes heated at 100° for 2 ho'tiri 

 Temp, of thermostat, 18 o, 0. 



Tune 



Number of 



Time 



Number of 



minutes. 



allizations. 



in minutes. 



cry>fallizalioi 



30 



10 



10 



3 



900 



26 



300 



12 



2300 



29 



1400 



17 



