FARM EQUIPMENT IOI 



ever, when the qualities of the new increments of supply are 

 considered. Whereas the new increments of supply of land are 

 expected to be less and less useful as time passes, not only are 

 the new increments of supply of equipments expected to be more 

 useful than the old supply, but the old supply may be replaced 

 by improved varieties. This is especially easy in the case of 

 machinery where a new design unrelated to those formerly in 

 use may entirely replace the old. With live stock, limitations 

 are set by the fact that the new is the progeny of the old and 

 possesses essentially the same characteristics. The oppor- 

 tunity for quick improvement here comes from the multiply- 

 ing of the animals of superior quality and eliminating those of 

 inferior quality. 



In general, the possibility of continuous improvement of the 

 usefulness of farm equipments makes the outlook for the future 

 optimistic in spite of the fact that the new additions to the farm 

 land area may be less and less useful. 



3IOAGRICULTURAL LIBRAR 

 UNIVERSITY OF CALIFORNIA 

 RIVERSIDE. CALIFORNIA 925 



