Agricultural Engineering 



A TEXT BOOK 



FOR 



STUDENTS OF 



SECONDARY SCHOOLS OF AGRICULTURE 



COLLEGES OFFERING A GENERAL 



COURSE IN THE SUBJECT 



AND THE 

 GENERAL READER 



BY 



J. BROWNLEE DAVIDSON, B. S., M. E. 



Member American Society of Agricultural Engineers 



Member American Society of Mechanical Engineers 



Member Iowa Engineering Society 



Professor of Agricultural Engineering, University of California 



Joint Author "Farm Machinery and Farm Motors" 



REVISED 



