FrontispieceAMERICANRURAL HIGHWAYSBYT. R. AGG, C.E.PROFESSOR OF HIGHWAY ENGINEERINGIOWA STATE COLLEGEFirst EditionMcGRAW-HILL BOOK COMPANY, Inc.NEW YORK: 239 WEST 39TH STREETLONDON: 6 & 8 BOUVERIE ST., E. C. 4