SUGAR PINE. • 39 



Table 24. — Merchantable length and diameter of top logs inside bark, sugar pine. 









Aver- 











Aver- 





Diam- 





Mer- 



age top 

 diam- 



Basis 



Diam- 





Mer- 



age top 



Basis 



eter 



Total 



chant - 



num- 



eter 



Total 



chant- 



diam- 



num- 



breast 



height.' 



able. 



eter 



ber of 



breast 



height .1 



able 



eter 



ber of 



high. 





length. 



inside 

 bark. 



trees. 



high. 





length. 



inside 

 bark. 



trees. 



Inches. 



Feet. 



Feet. 



Inches. 



M. 



Inches. 



Feet. 



Feet. 



Inches. 



No. 



8 

 10 



48 

 57 



223 

 230 







40 

 42 



148 

 152 



120 

 125 



11 

 11 



41 

 43 







12 

 14 



67 

 77 



23s 

 45 







44 

 46 



156 

 160 



130 

 134 



12 

 12 



39 

 31 



8 



1 



16 



86 



52 



8 



2 



48 



164 



138 



12 



43 



18 



92 



58 



9 



( 



50 



168 



143 



12 



41 



20 



98 



65 



9 



28 



52 



172 



147 



12 



56 



22 



104 



72 



9 



23 



54 



175 



151 



13 



36 



24 



110 



78 



9 



35 



56 



178 



155 



13 



25 



26 



116 



84 



9 



35 



58 



182 



159 



13 



25 



28 



121 



90 



10 



44 



60 



185 



163 



14 



28 



30 



126 



95 



10 



53 



62 



188 



167 



14 



25 



32 



131 



100 



10 



50 



64 



191 



170 



14 



27 



34 

 36 



38 



136 

 140 

 144 



105 

 110 

 115 



10 

 11 

 11 



38 

 36 

 40 













Total . 









852 











1 Basis 287 trees. 



2 Extension of cm've. 



KEY FOR THE IDENTIFICATION OF SUGAR PINE, WESTERN WHITE 

 PINE, AND WHITE PINE WOODS. 



The folio vring key for distinguishing the wood of sugar pine from that of the western 

 and eastern white pine is based chiefly upon characteristics visible under the com- 

 pound microscope, but all available gross characteristics are also included, and it is 

 believed that these will enable the layman to distinguish the three species. The 

 microscopic characteristics will, of course, be useful mainly to technically trained 

 students. The minute characteristics are often so variable that the student may have 

 considerable difficulty unless he takes into account every characteristic cited in the 

 key and make numerous careful measurements. There is also a good deal of variation 

 in the general gross appearance of the wood of these three pines, but those who are 

 thoroughly familiar with their gross characteristics visible in the rough and finished 

 states will be able to distinguish them quite readilj^ 



Pits on the radial walls of the pilh-ray cells two, or sometimes one, per tracheid, 

 round, ocrnirring side by side. Pith rays (tangential section) one to twelve, 

 or often sixteen cells in height. Resin canals about 0.13 to 0.16 mm. in 

 diameter. Wood yeno\\dsh white, or often very light brown, with rather 

 coarse grain. Resin canals conspicuous, appearing on a smooth longitudinal 

 surface as dark lines. Sugary exudations and resin pockets common. Weighs 

 abf>ut 2'.', pounds per cubif foot. . . : Sugar Pine (Pinus lambertiana), 



Pitfl on the nulial walls of the pith-ray cells one, two, or occasionally three per 

 tra/'heid, nearly round, and unually placed irregularly. Pi1h rays (tangential 

 section ) one to seven, or sometimes ten, cells in height. Resin canals about 

 0.13 to O.lo mm. in diameter. Wood light brown or reddish, with rather fine 

 grain. Resin canals not numerous and slightly less consi^icuous than iji 

 the one above. No sugary exudation. Weighs about 24.5 pounds per cubic 

 foot Wes'J'eun Wni'j'E Pinpj (Pinus moniicola). 



Pit8 on the radial walls of the pilh-ray c'-lls one, rarely two, per tracheid, large 

 and mo.stly oblong. Pith rays (fangential section) mostly one to twelve, or 

 WimetimcH fourteen, cells in height. R<!sin canals about 0.08 to 0. 12 mm. in 

 diameter. Wood cream yellow, or that innn very old trees li^dit hrown, 

 slightly tinged with red. Resin canals not very conspicuous and no sugary 

 exudations. Weighs about 24 pounds per cubic foot . . White Pin e {Pinus strobus). 



