Report upon the forestry investigations of the of agriculture1877-1898 . tructure is coTicerned, belong to the black oaks, but are much less porous, and are exceedinglyheavy and hard. III. DiiFOSE-PORous Woods. [A few inilistinrtly ring-porous woods of Group If, D, and cedar elm niny seem to belong here.] A. Pores varying in size from large to minute; largest in spring wood, thereby giving sometimes the appearance of a ring-jiorous arrangement. 1. Heavy and hard; color of heartwood (especially on longitudinal section) chocolate brown Blackwalniit. 2. Light and soft; color of hear
Report upon the forestry investigations of the of agriculture1877-1898 . tructure is coTicerned, belong to the black oaks, but are much less porous, and are exceedinglyheavy and hard. III. DiiFOSE-PORous Woods. [A few inilistinrtly ring-porous woods of Group If, D, and cedar elm niny seem to belong here.] A. Pores varying in size from large to minute; largest in spring wood, thereby giving sometimes the appearance of a ring-jiorous arrangement. 1. Heavy and hard; color of heartwood (especially on longitudinal section) chocolate brown Blackwalniit. 2. Light and soft; color of heartwood light reddish brown Butternut. B. Pores all minute and indistinct; most numerous in spring wood, giving rise to a lighter colored zone or line (especially on longitudinal section), thereby appearing sometimes ring porous; wood hard, heartwood vinousreddish; pith rays very fine, but very distinct. (See also the sometimes indistinct ring-porous cedar elm, andoccasionally winged elm, which are readily distinguished by the concentric wavy lines of pores in the summerwood) TPia. 11.—Wood of hickory. C. Pores minute or indistinct, neither c(mspicuously larger nor more numerous in. the spring wood and evenlydistributed. 1. Broad pith rays present. a. All or most pith rays broad, nnmerons, and crowded, especially on tangential sections, medium heavy and hard, difficult to split Sycamore. h. Only part of the pith rays broad. a. Broad pith rays well defined, iiuite numerous; wood reddish-white to reddish Beech. h. Broad pith rays not sharply defined, made up of many small rays, not numerous. Stem fur-rowed, and therefore the periphery of section, and with it the annual rings, sinuous, bending out, and the large pith rays generally limited to the furrows or concave portions. Wood white,not reddish _ Bhie teech. 2. No broad pith rays present. a. Pith rays small to very small, but ijuite Wood hard. a Color reddish white, with dark reddish tinge in outer s
Size: 2085px × 1199px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
