[41] Prepared by H. J. McKee and Arthur Wupper for the department of agricultural engineering, University of Illinois.
U.S. GOVERNMENT PRINTING OFFICE: 1934
For sale by the Superintendent of Documents, Washington, D.C. Price 10 cents
Transcriber Notes
All illustration were move so that paragraphs were not split. All plan footnotes were moved to the end of that plan. On [page 3], reference to plan 6521's page number was corrected.