SCIENTIFIC LITERATURE. 



135 



always been the mainstay of the elementary 

 embryologist. Hence we know more about 

 the processes and transformations by means 

 of which its egg develops than we do about 

 these same occurrences in any other egg; 

 and, as it is believed that the process which 

 goes on in one egg is, in a general way, a 

 counterpart of that which goes on in all 

 other eggs, we can, by studying the develop- 

 ment of the frog's egg, get a fairly good idea 

 of the embryology of all the other animals 

 hatched from eggs. This book is a careful 

 microscopic following of the process of de- 

 velopment in a frog's egg from the time 

 when the egg is forming to the moment 

 when the young tadpole issues from the 

 jelly membranes. Especial weight, however, 

 is laid on the results of experimental work, 

 tending to modify in various ways the nor- 

 mal process. Illustrations are used wherever 

 they tend to simplify the text. 



An essay on The Psychical Correlation of 

 Religious Emotion and Sexual Desire has 

 been published by Dr. James Weir, Jr., in 

 a tastefully got up pamphlet. He shows 

 the connection between erato-mania and re- 



ligious mania by facts drawn from Greek 

 and Roman history, the history of celibate 

 religious orders, and various anthropological 

 investigations. The author believes that 

 upon this correlation depends, in a great 

 measure, the stability of sexual morality. 

 (The author, Owensboro, Ky.) 



Art Education, the True Industrial Ed- 

 ucation, by W. T. Harris (second edition, 

 Bardeen, 50 cents), is an address deliv- 

 ered before the National Educational As- 

 sociation at the meeting in Nashville in 1889. 

 Dr. Harris contends that " aesthetic educa- 

 tion the cultivation of taste, the acquire- 

 ment of knowledge on the subject of the 

 origin of the idea of beauty (both its his- 

 toric origin and the philosophical account of 

 its source in human nature), the practice of 

 producing the outlines of the beautiful by 

 the arts of drawing, painting, and model- 

 ing, the criticism of works of art all these 

 things we must claim form the true founda- 

 tion of the highest success in the industries 

 of any modern nation." Dr. Harris, with his 

 well-known clear and incisive reasoning, sup- 

 ports this thesis through twenty-two pages. 



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Cole, James Reid. Miscellany. Dallas, Tex- 

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De Mortillet, Gabriel. Formation de la Langue 

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