with the earlier grades at least, the lessons must be fragmentary, 

 on one simple phenomenon at a time, without care for its rela- 

 tions, and the lessons should not be successive on one topic, but 

 interspersed with those on different topics. Convenience of treat- 

 ment for the teacher's use in the following lessons has led to a 

 continuous account in some cases. In the school work, this 

 should be broken up as suggested. It hardly need be added that 

 the book is designed as an aid to teachers and parents or others 

 directing Nature Study work and not as a Nature Study reader. 



The chapters under the titles : The Mosquito, Rearing In- 

 sects in the School Room, Some Water Insects, How to make a 

 Collection of Insects, About Spiders, How Insects Breathe, and 

 Birds were written by Professor Kellogg, and Professor Jenkins 

 is responsible for the remainder of the book. 



The drawings, with the few exceptions noted at the proper 

 places, were drawn from nature by Mr. W. S. Alkinbon and Miss 

 Mary Wellman. 



