Lectures on Conditioned Reflexes: Twenty—Five Years of Objective Study of the Higher Nervous Activity (Behavior) of Animals. By Prof. Ivan Petrovitch Pavlov, M.D., translated from the Russian by W. Horsley Gantt, M.D., B.Sc. Published by  International Publishers, New York, pp.  414; including Biographical Sketch, Bibliography and Index.

Although the results of Pavlov's experiments with dogs in developing conditioned reflexes have been far from unknown in England and America, they have never received the attention in these countries that their significance has merited. This has doubtless been due to the fact that until recently there has been no English translation of Pavlov's writings that covered the field of his researches. This has been remedied by the appearance in English of the volume under consideration and by a somewhat more detailed record of his experiments in Conditioned Reflexes, also recently published. As the title of the present book indicates, its contents consist of lectures. There are forty—one of these lectures, given before different scientific organizations between 1903 and 1928, and they accordingly represent the development of Pavlov's ideas over a quarter of a century of painstaking and critical investigation. Without in the least depreciating the genius of Pavlov, one must admire the discernment of Setchenov, who nearly fifty years earlier presented the fundamental idea of conditioned reflexes in an article entitled “Re—flexes