Production Note 

 Cornell University Library produced 

 this volume to replace the 

 irreparably deteriorated original . 

 It was scanned using Xerox software 

 and equipment at 600 dots per inch 

 resolution and compressed prior to 

 storage using ITU Group 4 

 compression. The digital data were 

 used to create Cornell ' s 

 replacement volume on paper that 

 meets the ANSI Standard 

 Z39. 48-1992. The production of this 

 volume was supported by the 

 National Endowment for the 

 Humanities. Digital file copyright 

 by Cornell University Library 1995. 



Scanned as part of the A. R. Mann 

 Library project to preserve and 

 enhance access to the Core 

 Historical Literature of the 

 Agricultural Sciences. Titles 

 included in this collection are 

 listed in the volumes published by 

 the Cornell University Press in the 

 series THE LITERATURE OF THE 

 AGRICULTURAL SCIENCES, 1991-1996, 

 Wallace C. Olsen, series editor. 



