. Foundations of botany. Botany; Botany. 108 FOUNDATIONS OF BOTANY obtained from maple trees in late winter or early spring, and is boiled down for syrup or sugar, is still richer in nutritious material than the water of the grapevine, while the elaborated sap which is sent so abundantly into the ear of corn, at its period of filling out, or into the growing pods of beans and peas, or into the rapidly forming acorn or the chestnut, contains great stores of food, suited to sus- tain plant or animal life. EXPERIMENT XXI Rise of Water in Stems. — Cut some short branches from an apple tree or a ch
. Foundations of botany. Botany; Botany. 108 FOUNDATIONS OF BOTANY obtained from maple trees in late winter or early spring, and is boiled down for syrup or sugar, is still richer in nutritious material than the water of the grapevine, while the elaborated sap which is sent so abundantly into the ear of corn, at its period of filling out, or into the growing pods of beans and peas, or into the rapidly forming acorn or the chestnut, contains great stores of food, suited to sus- tain plant or animal life. EXPERIMENT XXI Rise of Water in Stems. — Cut some short branches from an apple tree or a cherry tree and stand the lower end of each in red ink; try the same experiment with twigs of oak, ash, or other porous wood, and after some hours' examine with the magnifying glass and with the microscope, using the 2-inch objective, successive cross-sections of one or more twigs of each kind. Note exactly the portions througl which the ink has traveled. Pull off the leaves from one of the stems after standing in the eosin solution, and notice the spots on the leaf-scar through which the eosin has traveled. These spots show the posi- tions of the leaf-traces, or flbro-vascular bundles, connecting the stem and the leaf. Repeat with several potatoes, cut crosswise through the middle. Try also some monocotyledonons stems, such as those of the lily or asparagus. For the sake of comparison between roots and stems, treat any convenient root, such as a parsnip, in the same Fig. 76.—a Catting girdled and sending down Roots from tlie Upper Edge of the Girdled Bing. 1 If the twigs are leafy and the room is warm, only from 5 to 30 minutes may be 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
