Preface xxiii 



Readers will notice that, the same as with 

 our " Notes on Soil and Plant Sanitation," we 

 have sacrificed appearances for utility. Long 

 experience in the use of handbooks, both here 

 and abroad, has caused us to prefer a compact 

 volume, in plain close-set type, to a more showy 

 book, perhaps three times the size and yet 

 containing no more information. Believing 

 that our readers will share this opinion, we 

 have put up the book as seen, condensing the 

 large quantity of information it contains in the 

 smallest possible space compatible with legible 

 printing and easy reading. 



Acknowledgments are gratefully made to 

 Mr. Stuart R. Cope, for kind assistance in the 

 revision of the proofs of this book, and to the 

 Cie. du Boror, the Klanang Rubber Co., the 

 Philippine Journal of Science, The West 

 Indian Departments of Agriculture, Messrs. 

 Dean Worcester, Johnston and others, for 

 permission to reproduce various illustrations, 

 which have greatly added to the interest of 

 the volume, and which, we trust, will attract 

 attention to their own publications, which 

 specialize on the various subjects. 



London, H. H. S. 



January, 1914. 



