supplying information available in their files. Specialists in
Bureau of Agricultural Economics, in other government agencies,
and in the University of Wisconsin read the chapters covering their
fields of interest, checked the detailed data for accuracy, and made.
invaluable suggestions for their improvement.

The clarity of presentation and the graphic illustrations are in a
large part the result of the excellent editorial work of Lauren K. Soth
, editorial writer for The Des Moines Register and Tribune.

The author gratefully acknowledges his indebtedness to the
Social Science Research Council and to Shephard Clough of the
Committee on War Studies both for the initial planning which made
this study possible and for a grant of funds to cover the cost of the
editorial work and the preparation of the manuscript for the printer.

This study owes its existence, however, to the administrative
officers of the Wisconsin Agricultural Experiment Station and the
Bureau of Agricultural Economics who approved and supported
the research undertaking.

WALTER W. WILCOX
April 3, 1947

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