THE YOLK SPHERES OF THE HEN'S EGG AS OSMOMETERS

CONTENTS PAGE I. Problem . . . . . . . . . . . . . 253 11. Morphological components of the yolk . . . . . . . 254 111. Free yolk spheres in hypotonic solutions . . . . . . . 255 IV. Free yolk spheres in hypertonic solutions . . . . . . . 256 V. Osmotic properties of the yolk spheres contained within the endodermal cells 259 VI. Ovarial yolk . . . . . . . . . . . . 259 VII. Discussion . . . . . . . . . . . . 2 6 1 VIII. Summary . . . . . . . . . . . . . 263 IX. References . . . . . . . . . . . . 264