. Practical text-book of plant physiology. Plant physiology. PATH OF SAP THROUGH STEMS 211 typical leaves. Active coniferous shoots have been found to exert a force sufficient to raise a column of mercury 76 cm. (Fig. 107). 281. The Recovery of Wilted leaves by Aid of Increased Pressure ia Stems. Cut a young shoot of Helianthus and allow it to be supported in the air until the leaves have wilted noticeably. Now fasten it to one arm of a U-tube and fill the tube with water. If recovery does not take place pour several cc. of mercury in the free end of the tube. This will drive the water up into
. Practical text-book of plant physiology. Plant physiology. PATH OF SAP THROUGH STEMS 211 typical leaves. Active coniferous shoots have been found to exert a force sufficient to raise a column of mercury 76 cm. (Fig. 107). 281. The Recovery of Wilted leaves by Aid of Increased Pressure ia Stems. Cut a young shoot of Helianthus and allow it to be supported in the air until the leaves have wilted noticeably. Now fasten it to one arm of a U-tube and fill the tube with water. If recovery does not take place pour several cc. of mercury in the free end of the tube. This will drive the water up into the stem with some force and will re- sult in the recovery of the drooping leaves (Fig. 108). B. 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 MacDougal, Daniel Trembly, 1865-1958. New York [etc. ] Longmans, Green, and Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantph, bookyear1901
