9 .50 







TIME NECESSARY TO 







FREEZE 5cm. OF ICE 

 UNDER VARIOUS METE- 

 OROLOGICAL CONDITIONS, 

 £ = 2 cm. A £ =5cm„ NO 





,/ 



SNOW. 







fen- \ 















CLOl 



JO (N ) 







RELATIVE HUMIDITY (R. 











































V" (KNOTS) 2 



N„(% CLOUDINESS) 80 

 RH(%) 20 



60 



40 



20 

 80 



FIG. 2. INFLUENCE OF METEOROLOGICAL CONDITIONS ON 

 THE FREEZING OF ICE. 



11 



