PREFACE 



HIS book is designed to describe all the kinds of trees known to grow 

 independently of planting in North America, north of the West Indies 

 and Mexico, and to illustrate them by figures showing the character of 

 fohage, flowers, and fruit; a number of photographs illustrating the 

 general aspect of certain species have also been reproduced by engraving. The 

 drawings have been made with very few exceptions from specimens in the museums 

 or herbarium of the New York Botanical Garden, and the descriptions have been 

 drawn up from these specimens and from field observations. The Jesup collection 



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METRIC AND ENGLISH MEASURE 



Metric Name 



Kilometer 



Meter 



Decimeter 

 Centimeter 

 Millimeter 

 Micron or micro- 

 millimeter 



Relation to Standard 



1000 meters 



Standard 



Pij of a meter 

 x^Tj of a meter 

 j-jW of a meter 



TTiW of a millimeter 



Abbre- 

 viation 



km. 



m. 



dm. 

 cm. 

 mm. 



English Equivalent 



1093.61 yards ) 



.62138 of a mile J 



39.37 inches ) 



3.28 feet [ 



1.094 yards ) 

 3.937 inches 

 . 3937 of an inch 

 .03937 of an inch 



.00003937 of an inch 



Approxi mat ely 

 in English 



of a mile 



39^ inches 



4 inches 

 f of an inch 

 ^V of an inch 



5T^CTT of an inch 



pnotogragns oy ivir. r. \^. ueiic. 



Figures 27, 106, no, 265, 334, 506, 567, 657, 755, and 762 are from photographs 

 by Dr. Marshall A. Howe. 



Figures 32, 129, 139, 145, 148, 149, 205, 207, 211, 212, 214, 216, 234, 245, ^^3^ 

 335, 33^, 340, 345, 35o, 35i, 357 to 360, 470, 475, 476, 47^ to 481, 483 to 489, 491 to 

 493, 495, 496, 498, 501 to 505, 507, and 540 are from drawings by Mr. A. Meriolle. 



Figure 78 is from a photograph by Mr. W. F. Ballou. 



Figure 102 is from a photograph by Professor W. M. Wheeler. 



Figure 105 is from a photograph by Dr. D. T. MacDougal. 



Figure 107 is from a photograph furnished by Professor F. S. Earle. 



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