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 CCITT 

 Group 4 compression. The digital data were 

 used to create Cornell ' s replacement volume on 

 paper that meets the ANSI Standard 

 Z39. 48-1984. 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, 

 1991-1995, Wallace C. Olsen, series editor. 



