86 NATURE-STUDY REVIEW (11:2— Feb., 1915 



original habitat. It is a book that is primarily intended for the 

 farmer, that he may know more thoroughly the plants with which 

 he has to contend, but it makes a very excellent book to add to 

 the nature-study library. 



Sexual Ethics: A Study of Borderland Questions. By Robert 

 Michels. Pp. xv + 296. The Walter Scott Publishing Com- 

 pany, London; Charles Scribner's Sons, New York. $1.50. 

 This volume is a new one in the Contemporary Science Series. 

 It is a comparative study of sex relations and sex questions in the 

 various countries throughout the world. After a preliminary 

 chapter, the author discusses sexual education and states his 

 belief that we should plainly answer plain questions rather than 

 attempt to give detailed instruction. The remainder of the book 

 deals with borderland problems and deals with them in a very 

 thorough way. Part One takes up the problems of the erotic life ; 

 Part Two deals with such problems as apply to the extra-conjugal 

 conditions; Part Three with the pre-conjugal conditions, and Part 

 Four with the conjugal life itself. 



It is a book designed primarily for special students and the 

 author's views are sustained by abundant facts which he has at his 

 disposal. 



Farm Animals. Hunt & Burgett. ix + 534. Orange, Judd & 



Company. $1.50. 



In the first lesson the authors undertake to give some notion 

 of the classification of animals, or as they call it, the "assortment" 

 of animals, and this in ten pages. Lesson two on Animals Made 

 Useful, discusses Darwin's theory regarding natural selection, the 

 process of artificial selection, heredity, atavism, and Mendel's 

 Laws — all in ten pages. Lesson three tells of the relation of ani- 

 mals to man. The bulk of the book, however, is taken up with 

 discussions of the different breeds of animals, feeding of animals- 

 their care, and animal products. At the end of many of the 

 chapters there are practical exercises. Lessons (chapter) 5-9 

 are on Feeds, Rations and Digestion; 10-15 ^i"^ devoted to the 

 Horse; 16-21 to the Ox and Cow; 22-24 to Sheep. The Pig has 

 three chapters. Goats, bees and fish for the farm are each treated 

 in one chapter. Fowls of the Farm take up seven chapters. 

 Milk is discussed in tour chapters. The diseases of farm animals 

 and their health occupy six chapters. 



