CHAMONIX WORKING PLAN 



257 



eter class and the growth per cent calculated for the corresponding classes 

 by the growth per cent formula. The results were then evened off as 



150..000 - 



100,000 - 



55 50,000 - 



for the entire forget 



20 30 



Diameter in inches 



FIG. 20 (a). 



10 



20 30 



Diameter in inches 



40 



FIG. 20 (&). 



follows, the irregularity in the larger diameters being due to insufficient 

 data: 



