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OUR TREES 



HOW TO KNOW THEM 



PHOTOGRAPHS FROM NATURE 

 By 



ARTHUR I. EMERSON 



WITH A GUIDE TO THEIR RECOGNITION AT ANY 

 SEASON OF THE YEAR AND NOTES ON THEIR 

 CHARACTERISTICS, DISTRIBUTION, AND CULTURE 



By 



CLARENCE M. WEED, D.Sc. 



TEACHER OF NATURE STUDY IN THE MASSACHUSETTS STATE NORMAL SCHOOL AT LOWELL 



FIFTH EDITION 

 WITH AN ILLUSTRATED INTRODUCTION 





PHILADELPHIA W LONDON 



J. B. LIPPINCOTT COMPANY 



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