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 John Lane & Company for the use of the 

 poems of John B. Tabb; 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. 



