PREFACE 



Poultry farming as a means of profit can 

 be made successful only by maintaining the 

 most vigorous and sustained campaign 

 against disease. The aim of the poultry 

 rearer should be to stamp out disease by 

 preventive measures. Practical experience 

 proves the inefficiency of many so-called 

 cures, and points to the urgency of poultry- 

 men endeavoring to understand more thor- 

 oughly the causes of the ailments to which 

 domestic fowls are liable. 



My aim is to put a concise handbook into 

 the hands of poultry rearers, who should 

 thus be assisted in determining the various 

 diseases and in taking the precautionary 

 steps important in preventing the introduc- 

 tion and spread of contagious diseases. No 

 effort is made to elaborate the scientific side 

 of the subject. Those desirous of obtain- 

 ing full information about the types of 

 organisms that have been proved to be the 

 specific causes of, or to be invariably asso- 



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