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. 



