The Project Gutenberg EBook of American Rural Highways, by T. R. Agg

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Title: American Rural Highways

Author: T. R. Agg

Release Date: July 16, 2009 [EBook #29420]

Language: English

Character set encoding: ASCII

*** START OF THIS PROJECT GUTENBERG EBOOK AMERICAN RURAL HIGHWAYS ***

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[Transcriber's Note: Every effort has been made to replicate
this text as faithfully as possible, including obsolete and
variant spellings and other inconsistencies. Text that has been
changed to correct an obvious error is noted at the end of this
ebook.

Also, on pages 47-48, the Greek letter theta is represented by
THETA. In chemical and mathematical notations, a subscript is
enclosed in braces and preceded by an underscore (e.g., H_{2}O.)]

AGRICULTURAL ENGINEERING SERIES

E. B. MCCORMICK, CONSULTING EDITOR

FORMERLY DEAN OF ENGINEERING DIVISION
KANSAS STATE AGRICULTURAL COLLEGE

AMERICAN

RURAL HIGHWAYS

_McGraw-Hill Book Co. Inc._

PUBLISHERS OF BOOKS FOR

Coal Age -- Electric Railway Journal
Electrical World -- Engineering News-Record
American Machinist -- Ingenieria Internacional
Engineering & Mining Journal -- Power
Chemical & Metallurgical Engineering
Electrical Merchandising

[Illustration: _Frontispiece_]

AMERICAN
RURAL HIGHWAYS

BY

T. R. AGG, C.E.

PROFESSOR OF HIGHWAY ENGINEERING
IOWA STATE COLLEGE

FIRST EDITION

MCGRAW-HILL BOOK COMPANY, INC.
NEW YORK: 239 WEST 39TH STREET
LONDON: 6 & 8 BOUVERIE ST., E. C. 4
1920

COPYRIGHT, 1920, BY THE
McGRAW-HILL BOOK COMPANY, INC.

PREFACE

AMERICAN RURAL HIGHWAYS was written for use as a text or reference in
courses dealing with rural highways and intended for agricultural
engineers, students in agriculture and for short courses and extension
courses. The reader is assumed to have familiarity with drawing and
surveying, but the text is adapted prima