Fig. 2. Movement of Sawmills in New Hampshire Into and Out of Production, 

 1947-48 to 1961 (1947-48, 400 mills to 1961, 238 mills) 



30 



15 . 



Oaln 



In 



Sawillls 



In 



SiMlllllj 



15 _ 



30 . 



^5 _ 



• Figure only available for period 19'»7-'*8 

 •• n.pire only available for period 19'*8-'*9 



■ ** I 



, 1951 I 



,1953 



■ ^955, 



,1957 



■^959, 



.iHfb 



The annual cut (Table 6) indicates that from 1946 to 1960 from 64 to 

 74 percent of all lumber produced in the state was white pine. This ex- 

 tremely heavy dependency upon white pine by the industry means that 

 the average mill in New Hampshire, even considering the total cut, de- 

 pends mainly upon white pine for lumber. The total annual cut divided 

 equally among the number of mills in operation each year will give an 

 accurate average sawmill size for New Hampshire. It follows that this 

 size is dependent on white pine. 



In Figure 3 the total volume (hardwoods and softwoods) cut and the 

 white pine cut have been graphed. The total cut in each case shows a 

 relatively constant decline. If the total annual cut each year is divided 

 by the total operational sawmills each year, a graphic line can be shown 

 representing the average volume cut per mill per year. This line, or 

 more correctly the slope of a straight line running through the collec- 

 tion of points forming the average volume cut per mill line, will indi- 

 cate an overall decrease or increase in sawmill size. The average volume 

 of lumber cut per mill based on line B and Figure 4 graphically repre- 

 sents a yearly change in sawmill size for all mills representing the 

 annual cut. When this line is smoothed mathematically so that a trend 

 line may be drawn,* a very slight positive trend line can be shown. Line 

 B does not consider the fact that a fairly large number of the sawmills 

 in New Hampshire produce only a very small amount of the annual cut. 



* Trend lines were substantiated by using the curve smoothing method shown by 

 Scarborough (1958, Chapter 16, pp. 489495]. 



19 



