X PREFACE 



reached such a stage of perfection that its use is rapidly becoming 

 a universal practice. 



This rapid development of new methods and practices has made 

 it necessary to make another revision of Productive Poultry Hus- 

 bandry in order that these and many other new and worthy ideas 

 may be included in the body of the book. Two new chapters were 

 added to the last edition, one on culling and breeding for egg 

 production and one on poultry farm management. The present 

 edition carries many additions and improvements in the text 

 throughout as well as an entirely new chapter dealing with the 

 problems of artificial illumination. It is the hop e of the author 

 that this edition will continue to fill an important place in our 

 present-day poultry literature and that this revision with its 

 numerous additions will make the book still more useful to 

 student and poultryman. 



Harry R. Lewis. 



New Brunswick, New Jgrset, 

 February, 1921 



