PREFACE. 



IN an attempt, such as this, to cover a wide ground within a 

 book of small compass perfect accuracy cannot be hoped for, 

 completeness is impossible and originality is neither expected nor 

 desirable. Rather, however, than burden the body of the book 

 with constant acknowledgments of indebtedness, I have thought 

 it better to add a bibliographical appendix, indicating those works 

 from which I have borrowed most freely. For Figs. 1, 7, 16, 

 17 and 29 I am indebted to the courtesy of Mr. Francis 

 Darwin and the Syndicate of the Cambridge University Press ; 

 for Figs. 10, 18, 2123 and 27 to that of Professor Marshall 

 Ward and Messrs. Kegan Paul, Trench, Triibner & Co. ; for Figs. 

 12, 13, 15, 26 and 30 to that of Professor Somerville and Mr. 

 David Douglas ; and for Figs. 4, 28, 32, 37 and 45 66, which 

 are photographed from nature, to Mr. D. F. Mackenzie of Morton 

 Hall, Midlothian; whilst Figs. 2, 3, 6, 8, 9, 11, 14, 24, 25 and 

 38 44 have been drawn for me by Miss Emily Carter. 



The plates at the end of the book are photographs from 

 sections of common British-grown timbers magnified 3J times. 

 They were prepared by Arthur Deane, Esq., Assistant Curator 

 of the Warrington Museum, and are used by his kind permission 

 and that of the English Arboricultural Society. 



I have thought it well to indicate the pronunciation of the 

 Latin names by putting an accent over the syllables on which 

 the stress falls ; and it may be desirable to point out here 

 that the chief symbols employed in Part II. are explained on 



PP ' 139 - 140 - 109272 



