. Elements of botany. Botany; Botany. 226 ELEMENTS OF BOTANY. tained in the expanded portions, /. In these expansions there are produced somewhat splierical bodies, A, Fig. 197, which may be called egg-cells (oospheres), and ciliated fertil- izing cells, or antherozoids, G. After the bursting of the thin membrane, shown at A, by which the egg-spheres are confined, they become covered with multitudes of the fertiliz- ing cells, as seen at F and H, and are often whirled about by the motion of the cilia of these cells. At length, the sub-. FiG. 197. —Production of Spores of Rcckweed. (Much magnif
. Elements of botany. Botany; Botany. 226 ELEMENTS OF BOTANY. tained in the expanded portions, /. In these expansions there are produced somewhat splierical bodies, A, Fig. 197, which may be called egg-cells (oospheres), and ciliated fertil- izing cells, or antherozoids, G. After the bursting of the thin membrane, shown at A, by which the egg-spheres are confined, they become covered with multitudes of the fertiliz- ing cells, as seen at F and H, and are often whirled about by the motion of the cilia of these cells. At length, the sub-. FiG. 197. —Production of Spores of Rcckweed. (Much magnified.) i A, a bundle of egg-spheres, or oospheres (from interior of /, Fig. 19G); G, ciliated fertilizing cells, or antherozoids (from interior ', Fig. 196); F, H, egg-spheres changing to spores hy union of fertilizing cells with their contents. ((? is magni- fied more than twice as much as the other parts of the figure.) stance of one of the ciliated cells becomes mingled with that of the naked protoplasmic egg-sphere, and the latter soon proceeds to develop a cell wall and begins at once to grow into a new plant of rockweed. THE STUDY OF YEAST. 276. Orowth of Yeast in Dilute Syrup. —Mix about an eightli of a cake of compressed yeast with about a teaspoonful of water and stir until a smooth tliin mixture is formed. Add this to about half a pint of water in which a tablespoonful of molasses has been dissolved. I'lace this mix- 1 A and F of this figure represent the spore-producing apparatus from Furus platycarpus. Fig* 196 is Fncus rcsiculosus. The principle of spore-formation is very similar in the two 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. Boston, Ginn
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