Preface IX 



the earthworm and the soil; to Miss Ada Georgia for much valuable 

 assistance in preparing the original leaflets on which these lessons are based ; 

 to Dean L. H. Bailey and to Dr. David S. Jordan for permission to quote 

 their writings; to Mr. John W. Spencer for the use of his story on the 

 movements of the sun; to Dr. Grove Karl Gilbert, Dr. A. C. Gill, Dr. 

 Benjamin Duggar, Professor S. H. Gage and Dr. J. G. Needham for 

 reading and criticizing parts of the manuscript; to Miss Eliza Tonks for 

 reading the proof; to the Director of the College of Agriculture for use of 

 the engravings made for the original leaflets ; to Miss Martha Van Rens- 

 selaer for the use of many pictures from Boys and Girls; to Professor 

 Cyrus Crosby, and to Messrs. J. T. Lloyd, A. A. Allen and R. Matheson 

 for the use of their personal photographs; to the U. S. Geological Survey 

 and the U. S. Forest Service for the use of photographs; to Louis A. 

 Fuertes for drawings of birds; to Houghton, Mifflin & Company for the 

 use of the poems of Lowell, Harte and Larcom, and various extracts from 

 Burroughs and Thoreau; to Small, Maynard & Company and to John 

 Lane & Company for the use of poems of John T. Babb; to Doubleday, 

 Page & Company for the use of pictures of birds and flowers ; and to the 

 American Book Company for the use of electrotypes of dragon-flies and 

 astronomy. Especially thanks are extended to Miss Anna C. Stryke for 

 numerous drawings, including most of the initials 



