Report upon the forestry investigations of the of agriculture1877-1898 . Fig. 15.—Wood of Tvalnat. p. r., iiitli rays;c. I., concentriclines; v, vessels or pores;, summer wood; , spring wood. Flo. 16 Wood of cherry. STRUCTURK OF THE WOOD OF THE FIVE SOUTHERN PINES. The wood of these innes is so much alike in appearance and even in minute structure thatit can be discussed largely without distinction of species. The distinctions, as far as there areany, have been pointed out in the introduction. Here it is proposed to give in more detail thecharacteristics of the wood str
Report upon the forestry investigations of the of agriculture1877-1898 . Fig. 15.—Wood of Tvalnat. p. r., iiitli rays;c. I., concentriclines; v, vessels or pores;, summer wood; , spring wood. Flo. 16 Wood of cherry. STRUCTURK OF THE WOOD OF THE FIVE SOUTHERN PINES. The wood of these innes is so much alike in appearance and even in minute structure thatit can be discussed largely without distinction of species. The distinctions, as far as there areany, have been pointed out in the introduction. Here it is proposed to give in more detail thecharacteristics of the wood structure. SAP AND HEART WOOD. All five species have a distinct sap and heart wood, the sap being light yellow to whitish, theheart yellowish to reddish or orange brown. The line of demarcation between the two is welldefined, without any visible transition stage. The location of this line does not as a rule coincidewith the line of any annual ring, so that the wood of the same years growth may be sap on oneside of the tree and heart on the other. The difference in this condition may
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
