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Discusses ovulation in birds on stimulation by humans. Reports the findings of an experiment where a young female dove reared in isolation was found to lay eggs by being stroked on the back and head by the experimenter. The mate is not the only environmental factor in determining the time of egg...
Reviews three volumes of a set of 13 volumes which focuses upon birds. Emphasis is laid upon the structural characteristics of birds and upon their systematic relations, followed by a description of the various orders and families of birds. Gives illustrations as well as general information...
Investigated the "disguising' and "decorating' behavior in Oregonia gracilis. The motive behind the act differentiates between the two acts. The aim of the series of experiments conducted was to find the color reaction of crabs which have been exposed to white light; to colored light; the...
Investigated the reaction of toads to light and contact. A series of experiments were conducted on 12 toads in a dark room at an approximate temperature of 22 °c. Responses were measured upon exposure to the following conditions: Intense and less intense artificial light, strong and weak...
Discusses the origin of the cerebral cortex and its significance. The child's first experience are with completed physiological circuits which are rapidly modified by experience. No sensory impulses reach the cortex but only nervous impulses arising from lower correlation centers are possible....
Presents the Martin method of measuring induction shocks. Artificial induction of tissues is required in many physiological researches for which stimuli induction shocks are used. With the Martin method, the strength of the stimuli can be varied and controlled and duplication of an exact...
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