36 GEOIvOGICAIv SURVEY OF NEW JERSEY. 



Appendix to the Report of the State Geologist for 1898. These 

 measurements were made at Winslow, in pine which had been 

 protected from fire. It will be noted that the growth in diameter 

 and height of the short-leaf pine is more uniform than that of 

 the deciduous forest, and is much slower throughout, while the 

 height increases more slowly in early life, but reaches about the 

 same or a greater measurement in 100 years. The rate of 

 growth in height of the deciduous trees, being rapid at first and 

 slower afterward, is analogous to that of the short-leaf pine 

 South, as given in Mr. Pinchot's paper. It is also interesting to 

 ' note that while the increase in diameter of deciduous trees is 

 much more rapid than that of the short-leaf pine of southern 

 New Jersey, the figures given for trees on Highlands ridges and 

 other thin soils closely approximate the growth in diameter of 

 the southern short-leaf pine. This is made clear in the follow- 

 ing tables : 



Growth in Diafneter. Inches. 



Age. Deciduous, N. J. 



Years. Best Soil. Thin Soil. 



20 6.7 4.7 



30 lo.o 7.1 



40 13-4 9-3 



50 16.7 10.8 



60 20.0 12.2 



70 23.0 13.7 



80 25.0 14.9 



90 26.5 16.2 



ICO 28.0 17.4 



Growth in Height. Feet. 



Age. Deciduous. N. J. White Pitch Short- Leaf Pine. 



Years. Best Soil. Thin Soil. Cedar. N. J. Pine. N.J. New Jersey. South. 



20 30 24 II 16 14 



30 40 31 21 Zl 24 41 



40 47 38 32 45 , 33 ■ 51 



50 , 53 44 40.5 53 5 4i 60 



60 57 47 48 59-5 47-5 67 



70 59 48 54-5 63.5 53 71 



80 60 49 60 67.0 57.5 75 



90 61 50 . . . . 61.5 78 



100 62 51 . , . . 64.5 81 



