VOLUME /N CUB/C FEET. 



^ 



§ 



Cb 



% 









Cb 





'N 



N) 



-Iv 



Oi 



Cb 



Ci 



Cb 







Co 





Cb 



I 



Fia. 16.— Grapliic representation of volume growth. 



5107 Faces page 60 



