FhalMa£.S.5.Vol.7. Pl.X. 

















































































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1 







c 









B 



A 



Curve A is y 



1-5 



-X- 



300 e. W 



2 — e ~80 

 Cu,rve B is y = $00 e 80 



C is 



y 



300 e 



2 - 25 



see eauuatim ( 20 ) 



s&e 6 21 



MaiiierjiBxo s -Mk. 



