















At = l7°F 

















h 

 -(FEET) 



- 140 



- 130 

 r 120 

 7 110 

 r 100 



r 90 



- 80 

 7 70 



r so 



'- 50 



r 40 



7 30 



- 20 



r l0 

























































































































































































































































































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0.2 0.4 0.6 0.8 1.0 1.2 1.4 



1.6 1.8 2.0 2.2 2.4 2.6 



FIGURE 22 PARAMETERS v AND h VERSUS k FOR STABILITY INDEX At » 16° TO 18° F 



2.8 3.0 



hS 



