. Our field and forest trees. Trees. 140 Our Field and Forest Trees days. In autumn or winter, the cells which are in the pith-rays may contain sugar or oil, and they are almost certain to contain countless tiny starch grains saved here to be made over into nourish- ing food for growing shoots next spring. When wood is cut down in winter, many of its cells are found to be so filled with starch grains that water cannot Fig. 33. Cross section of a young paSS thrOUgh it. So " winter-hewn lumber," as it is called, is greatly preferred for the staves of barrels which are to hold liquids.
. Our field and forest trees. Trees. 140 Our Field and Forest Trees days. In autumn or winter, the cells which are in the pith-rays may contain sugar or oil, and they are almost certain to contain countless tiny starch grains saved here to be made over into nourish- ing food for growing shoots next spring. When wood is cut down in winter, many of its cells are found to be so filled with starch grains that water cannot Fig. 33. Cross section of a young paSS thrOUgh it. So " winter-hewn lumber," as it is called, is greatly preferred for the staves of barrels which are to hold liquids. " Summer- wood " is much more porous, and the contents of the barrel are liable to evaporate through these pores. In April, May, and June the trees are building new substance. Around every trunk, between the wood and the inner bark, there is at this season a sheathing of young cells full of life and ready to make new wood and new bark. These building cells are called cambium. They get to work early in the spring, and after their yearly task is well under way trees can be easily peeled. As old farmers say " the bark will ; When we peel a bough we break many cells of the Innermost bark. In winter these cells are. 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 Going, Maud, 1859-1925. Chicago, A. C. McClurg & Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttrees, bookyear1916
