-10" 



100 



-10 



10 



-10" 



l-IO 



-0.1 



40 60 100 200 400 600 1,000 2,000 4,000 



J /g (oft«r WitstI, I9«0) 



V d 



Figure 2-11. Relationship Between k*^, H /d and T vg/d 



2-52 



