PREFACE ix 



have given permission for the reproduction of illustra- 

 tions from other books and publications ; where the 

 latter have been used credit has been given at the foot 

 of the illustration. Several drawings were specially 

 prepared by Mrs. Burtt-Davy, and many of the illus- 

 trations have been reproduced from the Transvaal and 

 Union Agricultural Journals, by the courteous permis- 

 sion of the Editor, Dr. Wm. Macdonald. 



Grateful acknowledgment is made to those friends 

 at Cambridge and elsewhere, especially to Professor 

 R. H. Biffen, F.R.S., and Professor R. H. Punnett, 

 for valuable suggestions and assistance, particularly in 

 connection with the inheritance of characters ; and to 

 Mr. J. D. Anderson, M.A., and Dr. Nicholson, for 

 assistance and information with regard to Hindoo and 

 Persian names. Thanks are also offered to the Com- 

 mittees, Members and Secretaries of the Liverpool, 

 Mark Lane and Baltic Corn Exchanges, for their 

 courtesy in obtaining and supplying information, and 

 particularly to Mr. Broomhall, Editor of George Broom- 

 hall's Corn Trade Netvs, Mr. A. Grenville Turner of 

 the Liverpool Corn Exchange, and Mr. H. M. Cole- 

 brook of the Baltic and Mark Lane Exchanges, for 

 their valuable assistance. 



JOSEPH BURTT-DAVY. 



School of Agriculture, 

 Cambridge, 28 August, 1913. 



