. Hydration and growth. Growth (Plants); Plants. Fig. 5.—Sectional views of desiccator for drying plates of colloids, a, frame with drying-plate lying on a sheet of stretched filter-paper, which in turn is placed on a shelf of slats; b, metal pan containing water to maintain relatively high humidity; c, electric fan arranged to keep current of air moving over the suif ace of the water, the plate of colloid, and in circulation in the chamber; d and e, hinged lids which may be raised to control ventilation and the rela- tive humidity of the chamber. A wooden chamber about a meter in height, over
. Hydration and growth. Growth (Plants); Plants. Fig. 5.—Sectional views of desiccator for drying plates of colloids, a, frame with drying-plate lying on a sheet of stretched filter-paper, which in turn is placed on a shelf of slats; b, metal pan containing water to maintain relatively high humidity; c, electric fan arranged to keep current of air moving over the suif ace of the water, the plate of colloid, and in circulation in the chamber; d and e, hinged lids which may be raised to control ventilation and the rela- tive humidity of the chamber. A wooden chamber about a meter in height, over a meter in length, and 80 cm. in width. sisting of 9 parts agar and 1 part bean albumen a plate cast in this manner came down so perfectly tha,t a strip 30 mm. in length placed in distilled water swelled over 2,000 per cent in thickness, but did not increase any measurable fraction of a millimeter in length. A strip. 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. Washington, Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1920
