OXYGEN AND MALE PRODUCTION 487 



-C -3 -3 T3 



.S .S S C 



3 3 3 3 



T3 '3 "3 "3 



e c a c 



3 3 3 3 



3 -^ 



® O "3 



S «^ '3 



■s S =« S 



5 U S ^ 



O O O 



-3T3 -3-3 '3'3"3C'T3 '3'S'o 



!h ShTSTS Sh i-TSTS i- t-i'3'J^iS !hT3 i-iT3C 



fl fl'73'3 C fl'3'3 3 fi-^i^C C— C'-"'3G 



•-S 



s s s s s s s s s s s 



