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abnormal anaphase animals ascending phase background blastomeres Calkins cell division cent changes chromatin bodies chromatophores chromosomes cleavage climax conjugation contraction coracoid Ctenolabrus cytological cytoplasm daily isolation cultures darkness degeneration division rate embryos endomixis Erdmann evidence expanded EXPERIMENTAL experiments eyeless larvae fibers fibrin fibrous tissue formation frog hay infusion Hertwig hybrids hypotrichous imbedded tissue Infusoria Jour Kernapparates larvae light Line macronuclear anlagen main culture Maupas medium melanophores membrane method micromeres micronuclear division micronuclei monaster eggs movement muscle nerve normal larvae nuclear apparatus nuclei observed occurred Oxytricha Paramaecium aurelia Paramaecium caudatum parthenogenesis pectoralis major pedigreed race period physiological pigment cells plasma clot posterior present Protistenk protoplasmic Protozoa race of Paramaecium reactions reorganization process rhythms scapula shown in figure sister cells skin solution spindle stain sternum stimulation Stylonychia Subculture IE temperature text fig Text figure tion typical Woodruff Zool zwei
Page 520 - To promote the increase of natural knowledge, and to forward the application of scientific methods of investigation to all the problems of life, to the best of my ability, in the conviction, which has grown with my growth and strengthened with my strength, that there is no alleviation for the sufferings of mankind except veracity of thought and action, and the resolute facing of the world as it is, when the garment of make-believe by which pious hands have hidden its uglier features is stripped off.
Page 475 - It will be shown in a later section of this paper that absolutely good effluents although possible are seldom required.
Page 520 - The father of the righteous shall greatly rejoice: and he that begetteth a wise child shall have joy of him.
Page 520 - By the Tiber, as by the Ganges, ethical man admits that the cosmos is too strong for him; and, destroying every bond which ties him to it by ascetic discipline, he seeks salvation in absolute renunciation.
Page 520 - Hebraism and Hellenism — between these two points of influence moves our world. At one time it feels more powerfully the attraction of one of them, at another time of the other ; and it ought to be, though it never is, evenly and happily balanced between them.
Page 520 - On thé influence of temperature upon cardiac contraction and its relation to influence of temperature upon chemical reaction velocity.
Page 520 - Zeiss binocular microscope, which was kept as nearly as possible at the same temperature as the fluid from which the embryos had been taken.
Page 238 - Experimental studies on the development of the eye in Amphibia. III. On the origin and differentiation of the lens. Amer.
Page 428 - varied' environment, and therefore ... it appears fair to conclude that it is the 'composition' of the medium rather than the changes in the medium which is conducive to the unlimited development of this culture without conjugation or artificial stimulation" (15, page 141). From this basic investigation, giving conclusive results on an ancient and fundamental problem, have grown branch studies by Woodruff and his associates on a large number of diverse factors affecting reproduction. This work has...