98 NATURE-STUDY REVIEW [12:2— Feb., 1916 



Laboratory Outlines for Embryology. Mary T. Harmon. Pp. vi 

 + 50. P. Blakiston's Son & Co. $.50. 



This is a laboratory guide for use in connection with the study 

 of the chick and the pig. It is purely a technical book. The 

 laboratory descriptions seem clear and concise. 



School Janitors, Mothers and Health. By Helen C. Putnam. 

 Pp. 201. American Academy of Medicine. $1.00. 



This book is dedicated to the American Association for the Study 

 and Prevention of Infant Mortality. The subject matter is 

 school house-keeping. It is written from the point of view of a' 

 woman and a physician. It is a high time that we keep our school 

 houses as decently as our homes, for our children are exposed there 

 to contagion, to unsanitary conditions of light, temperature and 

 moisture, for long hours. This book is an appeal to the mothers 

 to interest themselves in the problems of health of the child in the 

 school. Chapter 1 is on the prevention of school fatigue; chapter 

 2 on mothers' clubs and clean school houses ; chapter 3 on school 

 janitors and health. Chapter 5 is exceedingly attractive — the 

 training of janitors and sanitary care of school premises. It is 

 brief, but very much to the point. This is not a book of theory, 

 but a book of fact, for the women have been collecting data regard- 

 ing school conditions and the facts as set forth are, to say the least, 

 interesting. Here is one paragraph as a sample thought on page 

 136: 



"Of the deaths between 25 and 34 years of age among all people 

 in Michigan during certain years, one-quarter (25.8 per cent, was 

 due to tuberculosis; but among teachers it was over one-half (52.4 

 per cent). Among all ages, only one-eleventh (9.4 per cent.) of 

 the general death rate was due to tuberculosis, but among teachers 

 the rate was three times greater (27.6 per cent.)." 



Heroes and Great Hearts, and Their Animal Friends. By John 

 T. Dale. Pp. x + 240. D. C .Heath & Co. $.60. 



This is a reader including a combination of various selections 

 about birds and dogs and other animals, mostly the familiar ones 

 of the home, and bits of biology regarding the interest which great 

 men have taken in the animals about them. The selections are as a 

 rule very good, being taken witlr carejfrom authors of good repute. 



