. Foundations of botany. Botany; Botany. 76, and covered with a near the upper edge of the stripped portion,^ and this would seem to prove that such stems send their building ma- terial â the elaborated sap â largely at any rate down through the bark. Its course is undoubt- edly for the most part through the sieve-cells (Figs. 63,64), which are admirably adapted to Fig. 78. âniagrammatio Cross-Section of a COUVey liqUlds. In ad- Bundle from Sugar-Cane, showing Channels (Jj^ion tO thcSC general for Air and Water. (Magnified.) ° V *v . 1 upward and downward Air travels downward through the two
. Foundations of botany. Botany; Botany. 76, and covered with a near the upper edge of the stripped portion,^ and this would seem to prove that such stems send their building ma- terial â the elaborated sap â largely at any rate down through the bark. Its course is undoubt- edly for the most part through the sieve-cells (Figs. 63,64), which are admirably adapted to Fig. 78. âniagrammatio Cross-Section of a COUVey liqUlds. In ad- Bundle from Sugar-Cane, showing Channels (Jj^ion tO thcSC general for Air and Water. (Magnified.) ° V *v . 1 upward and downward Air travels downward through the two large J^ ducts d (and the two smaller ones between mOVCmentS of Sap, there them). Water travels upward through the , , , transfprs ducts and through the wood-cells in the mUSt DC iOCai tranSICrS region marked w. Water with dissolved plant-food travels downward through the sieve-cells in the region marked s. laterally through the stem, and these are at times of much im- portance to the plant. Since the liquid building mate- rial travels straight down the â J £ i. 1. âUnequal Srowthof Rings stem, that side OI the stem on of wood in nearly Horizontal which the manufacture of such stem of a juniper. (Natural size.) material is going on most rapidly should grow 1 This may be made the subject of a protracted class-room experiment. Strong shoots of willow should be used for the 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; Eastwood, Alice, 1859-1953. Boston, Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1901
