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 2Z39.48-1992. The production 
of this volume was supported in part 
by the National Endowment for the 
Humanities. Digital file copyright 
by Cornell University Library 1994. 
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. 
