VI PREFACE 



of his kindness. He has read some of the chapters and greatly 

 assisted me by his friendly criticism and encouragement. By 

 reading the proofs of this volume Dr Scott has further increased 

 my already large debt to him. It is impossible to thank him 

 adequately; he not only corrected many careless mistakes but 

 by wise counsel and advice he rendered me a service which 

 T greatly appreciate. 



The exchange of views with Prof. Zeiller has been a constant 

 source of profit and enjoyment, and it is hard to realise that the 

 completed book will not receive his kindly criticism. He was 

 a singularly unselfish and generous colleague,, always ready to 

 help fellow workers, and he had the faculty in an unusual degree 

 of influencing those who had the privilege of his friendship 

 by his sound advice and lovable personality. 



The death of Count Solms-Laubach has deprived Palaeo- 

 botany of one of its most learned and strongest supporters. 

 In common with all students of fossil plants I owe much to 

 the critical treatment of the subject in the Einleitung in die 

 Paldophytologie. Prof. Jeffrey has very kindly given me several 

 photographs and sections which have been of great service, and 

 I am similarly indebted to Prof. Zalessky.. To Prof. Nathorst 

 my thanks are due for the great interest he has taken in my 

 work and for his generosity in providing drawings and showing 

 to me many of the treasures in the famous Stockholm Museum. 

 Prof. Bertrand and Prof. Lignier freely supplied photographs 

 and drawings of specimens in their possession, and I am 

 particularly grateful to them for the willingness with which 

 they always responded to my requests. 



Through the death of Prof. Lignier in March 1916 Palaeo- 

 botany has been deprived of another original thinker who 

 devoted himself with whole-hearted enthusiasm to botanical 

 research and for many years faithfully served the University 



