Vi PREFACE. 



During these past twenty years no work dealing 

 with the fruits of the genus citrus has been produced. 

 The literature has not kept pace with the growth, the de- 

 velopment, and the new phases of the industry. To fill a 

 long-felt want, this volume after many urgent appeals 

 from those interested in and engaged in the industry has 

 been produced in the hope that it may, in some measure at 

 least, supply the lack of reliable, up-to-date information. 



In its preparation the author has had the hearty co- 

 operation, assistance and sympathy of many friends. The 

 chapter on Fertilizers and Fertilizing has been reviewed by 

 Prof. H. K. Miller, of the University of Florida, that on 

 Cover Crops, by Prof., John Craig, of Cornell University, 

 while the chapter on Insects Injurious to Citrus Trees, has 

 been revised and largely re-written from his former publi 

 cations, by Prof. H. A. Gossard, of the University of Flor 

 ida. The chapter on Pot Culture of Citrus Fruits, has 

 been revised by Mr. E. N. Reasoner, of Oneco, Fla. Dr. 

 N. L. Britton, Dr. D. T. MacDougal and Miss Anna Mur 

 ray Vail, of the New York Botanical Garden, have made it 

 possible to examine the older works on citrus fruits, and 

 have rendered much valuable assistance. Prof. A. W. 

 Blair, of the University of Florida, has contributed an 

 analysis of one of the cover crops, heretofore unpublished. 

 All the drawings and some of the photographs used in the 

 illustrations were made by Miss Lucia McCulloch for- 

 merly assistant in the Department of Botany and Horti- 

 culture in the University of Florida. Prof. Dorsey now 

 of the Mechanics' Institute, Rochester, New York, contrib 

 uted a number of photographs, while those illustrating 

 California scenes were secured through the kindness of 

 Prof. C. W. Woodworth, of the University of California, 



