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 Z3 9. 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 

 piiblished by the Cornell University Press in 

 the series THE LITERATURE OF THE 

 AGRICULTURAL SCIENCES, 1991-1996, Wallace C. 

 Olsen, series editor. 



