MANAGEMENT OF DUCKS 



153 



arranged that the entire series is heated by pipes coming from 

 a hot-water heater, instead of each chamber having an inde- 

 pendent lamp heater as in the small, or individual, machines. 



FIG. 139. Feeding young ducks on farm of W. R. Curtiss & Co., 

 Ransomville, New York 



As nearly all kinds of supplies are bought by the carload, and 

 as stocks must be kept up so that there will be no possibility 

 of running short of foodstuffs, a great deal of space is required 



