15 



bole. * '" * The oldest timber studied was about eighty 

 years old, at which age it attains a maximum diameter of 

 fifteen inches and a height of seventy feet. * * * In 

 view of the value of cedar, it is important to have some 

 definite figures concerning its rate of growth and its repro- 

 ductive capacity. On account of the regular growth of the 

 trees and the comparatively even stands, a few measurements 

 will suffice to afford a basis for broad generalization. The 

 cedar appears to require on an average sixty years to reach 

 a height of fifty feet and eighty years to reach sixty.- It is 

 interesting to note that when the forest is thinned the trees 

 grow more rapidly in diameter than when they remain in 

 crowded stands. At Marigold Swamp seven stumps were 

 measured of trees which had stood for some years on the edge 

 of a clearing. These trees were growing at the rate of 2.2 

 inches in diameter in ten years, whereas four trees measured 

 within the same stand showed an average rate of growth of 

 about 1.05 inches in ten years, or a little less than half. 

 There are few trees, if any, which grow in as dense masses as 

 White Cedar. In order to show the number of trees per acre 

 and the amount of wood at different ages, eight sample plots 

 were measured and the trees counted. These valuation sur- 

 veys are summarized below. At twenty years of age there 

 were over 10,000 trees per acre, at forty years about 3,500 

 and at eighty years in one case still over 1,000. From these 

 figures it follows : First, that it requires about sixty years to 

 produce lumber in paying quantities ; second, that it would 

 pay to thin the forest when it is about forty to sixty years old." 

 (Geol. Pipt, '98, Pinchot, 57.) 



"Chamcecyparis thyoides forms the bulk of the vegetation 

 in the cedar swamps of the coniferous zone. Rare in the ten- 

 sion zone. Locally in limited numbers in certain isolated 

 swamps in the deciduous zone, Secaueus, Xew Durham, High 

 Point," &c. (Geol. Rpt, '99, Hollick, 189.) 



' "Perhaps the easiest and quickest way to secure a stand of 

 White Cedar is to plant it. Young cedars are constantly in- 

 vading cranberry bogs where they are very unwelcome. These 

 can be easily secured in large quantities, and are better for 

 planting than the spindling specimens from the woods. 

 Another way is to sow the seed. After removing all the trees 



