PREFACE. Vli 



these points is given in the author's " Botany for 

 Beginners," * to which the present volume is in some 

 sense complementary. 



Detailed text- books of Botany, or of Vegetable 

 Physiology, expressly adapted to the requirements 

 of agriculturists do not exist, but there are many 

 works from which a comprehensive general idea of 

 the present state of knowledge on these subjects 

 may be obtained. 



Foremost among them is the second English 

 Edition of Sachs' " Text Book of Botany," edited by 

 Dr. Vines. 



The "Elementary Text Book of Botany/' by 

 Prantl, of which an English edition has been 

 published, also under the supervision of Dr. Vines 

 is in some sense an abridgment of Sachs' larger 

 volume. Of similar nature is " The Text Book of 

 Structural and Physiological Botany," by Thome*, 

 edited by Mr. Alfred Bennett. The third edition of 

 Henfrey's " Elementary Course of Botany," edited 

 by the present writer, is, like Bentley's " Manual of 

 Botany," more comprehensive in scope than the 

 works last named. 



In the compilation of the following pages the 

 writer has availed himself of the foregoing works, as 



* Published by Messrs. Bradbury, Agnew, & Co. 



