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 239.48-1992. The 
production of this volume was 
supported in part by the National 
Endowment for the Humanities. Digital 
file copyright by Cornell University 
Library 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. 
