Viii PREFACE TO FIRST EDITION. 



him for revising these chapters and rewriting many pages of 

 them, so as to make them more distinctly applicable to British 

 insects. While those portions of the work of Dr. Hess which 

 deal with insects unknown in the British Isles have been 

 largely abridged or entirely omitted, it has not been found 

 possible or advisable to remodel the chapters on insects from 

 an entirely British point of view. The scientific names of the 

 insects referred to have been altered, wherever this was 

 required, so as to conform with the nomenclature adopted in 

 the best modern systematic works on British entomology. 



Dr. H. Marshall Ward, F.E.S., has very kindly looked over 

 Part III., which deals with forest weeds and fungi, in which he 

 has made some corrections. The scientific names of the forest 

 weeds follow Hooker's and Bentham's British Flora, 1892, 

 and those of the fungi, E. Hartig's Lehrbuch der Baum- 

 KRANKHEiTEN, being nearly all the same as those adopted by 

 Dr. Hess. 



My colleague Dr. F. E. Matthews, F.I.C, has very kindly 

 assisted me wherever any special knowledge of chemistry was 

 required, as in the last chapter dealing with the effects of acid 

 fumes on trees, and also in correcting proofs of the whole 

 l)Ook. I have to thank Mr. J. W. Sowerby, of the Botanic 

 Gardens, Eegent's Park, for information supplied regarding 

 the effects of London smoke on the growth of trees. 



Due reference will be found in the footnotes to the authors 



whose works I have consulted. 



W. E. FISHEE. 



CooPKRS Hill College. 

 May 1st, 1895. 



