. Laboratory and field manual of botany. Botany. 60 STRUCTURE AND PHYSIOLOGY OF SEED PLANTS and describe the main differences in color, height, and thickness of hypocotyl, and in the development of the cotyledons of those grown in darkness and in the light. What is the conclusion in regard to power to make chlorophyll ? Leave both lots in sunlight for a day and test some cotyle- dons of each set for starch. Leave both sets in sunlight for several days more and note any changes in the appearance of those which were started in darkness. Test the latter again for starch. Conclusions ? Eefeeence.
. Laboratory and field manual of botany. Botany. 60 STRUCTURE AND PHYSIOLOGY OF SEED PLANTS and describe the main differences in color, height, and thickness of hypocotyl, and in the development of the cotyledons of those grown in darkness and in the light. What is the conclusion in regard to power to make chlorophyll ? Leave both lots in sunlight for a day and test some cotyle- dons of each set for starch. Leave both sets in sunlight for several days more and note any changes in the appearance of those which were started in darkness. Test the latter again for starch. Conclusions ? Eefeeence. Pfeffer-Ewart, 31, IL EXPERIMENT XXXVI Do leaves give off water ? If so, from which surface is it given off more abundantly? * * Fasten two small watch glasses^ one on each side of a leaf of a plant growing vigorously in a pot or out of Fig. 4. Watch glasses fastened on a leaf of Chinese primrose Hydrangea,* primrose, or cineraria ^ are good plants for the pur- pose, although many others will answer. The watch glasses may be held in place by a spring clip, as shown in Fig. 4. Seal the margin of each glass all the way around by means of vaseline oi barely melted grafting wax. Leave the plant for half an hour or more in a sunny place, and then look for drops of water inside 1 H. Hortensia. 2 Senedo 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; Davis, Bradley Moore, 1871- joint author. Boston, New York [etc. ] Ginn & company
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