. Elements of botany. Botany. 72 ELEMENTS OF BOTANY outside of the wood in early spring is a fact well known to the schoolboy who pounds the cylinder cut from an alder, willow, or hickory branch until the bark will slip off and so enable him to make a whistle. The sweet taste of this pulpy layer, as found in the white pine, the slijipery elm, and the basswood, is a familiar evidence of the nourishmeiit ^^â¢hich the cambium layer contains. With the increase of the hbro-vascular bundles of tlie wood the spjace between them, which ap- pears relatively large in Fig. -iO, be- comes less and less, a
. Elements of botany. Botany. 72 ELEMENTS OF BOTANY outside of the wood in early spring is a fact well known to the schoolboy who pounds the cylinder cut from an alder, willow, or hickory branch until the bark will slip off and so enable him to make a whistle. The sweet taste of this pulpy layer, as found in the white pine, the slijipery elm, and the basswood, is a familiar evidence of the nourishmeiit ^^â¢hich the cambium layer contains. With the increase of the hbro-vascular bundles of tlie wood the spjace between them, which ap- pears relatively large in Fig. -iO, be- comes less and less, and the pith, which 44. Diagram to illustrate Secondary at lirst extended Growth in a Dicotyledonous Stem. ^^.^^^^^ ^^^ ^^^^^^,^^ 7?, tlie first-formed barlv ; ;j, mass of sieve-cells ; j-i ' â f ifp, mass of sieve-cells between the original ^""^ Circumterence wedftes of wood; /c, cambium of wedges of of the stcm, beCOmCS worM] ; /c, i-andiium between wedges ; ?^, groutxs i ⢠â , ,1 ... , ,,, . , , compressed into â it basl-cells ; th, wood of the oi-igmal wedges ; r' <77(, \\"(""1 fnrnied betweeii wedges; 1% earliest thill plates SO aS tO wo<.»d lurniL'd: M oith. r t n torm medullary rays. These are, as already stated, of use in storing tlie food wliich the plant in cold and temperate climates lays up in the summer and fall for use in the following spring, and in the very young stem they serve as an important channel for the transference of fluids across the stem from. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1904
