. Field, forest and farm; things interesting to young nature-lovers, including some matters of moment to gardeners and fruit-growers. Natural history; Agriculture. THE STALK OF THE PLANT 71 on one side a layer of wood which attaches itself to the outer surface of the preceding year's layer, and on the other side a thin sheet of bark which is added to the inner surface of the bark already formed. "Thus each year both bark and wood form a new layer; but this added layer is applied in opposite ways in the two in- stances,—outside on the wood, inside on the bark. The wood thus encircled from
. Field, forest and farm; things interesting to young nature-lovers, including some matters of moment to gardeners and fruit-growers. Natural history; Agriculture. THE STALK OF THE PLANT 71 on one side a layer of wood which attaches itself to the outer surface of the preceding year's layer, and on the other side a thin sheet of bark which is added to the inner surface of the bark already formed. "Thus each year both bark and wood form a new layer; but this added layer is applied in opposite ways in the two in- stances,—outside on the wood, inside on the bark. The wood thus encircled from year to year by new layers increases in age o«»s section of Tree Trunk toward the center and becomes younger and younger toward the circumference, whereas the bark, lined every year with a fresh sheet, shows its youth on the inside and its age on the outside. The first buries inside the trunk its decrepit and dead layers; the second thrusts its old layers outside, where they crack and fall off in large scales. This aging process is simultaneous on the outside and in the center of the tree-trunk; but between the wood and the bark life is always at work, creating fresh accretions. "Here are some experimental proofs of this an- nual formation of a ligneous layer. A strip of bark is removed from the trunk of a tree, and on the wood thus laid bare is fastened a thin sheet of metal. The bark is then replaced and bound with ligatures so that the wound may heal. We will suppose ten years have passed. The bark is raised again at the same place. The metal sheet is no longer visible; to find it you must bore deep into the wood. Now,. 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 Fabre, Jean-Henri, 1823-1915; Bicknell, Florence Constable, tr. New York, The Century Co.
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Keywords: ., bookcentury1900, booksubjectagriculture, booksubjectnaturalhisto
