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COLLEGE OF CIVIL ENGINEERINI. STATE UNIVERSITY OF KENTUCKY.

Lexington, · · Kentecky:

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AND

PAVING MATERIALS.

A MANUAL OF CITY PAVEMENTS : THE
METHODS AND MATERIALS OF

THEIR CONSTRUCTION.

FOR THE USE OF STUDENTS, ENGINEERS,

AND CITY OFFICIALS.

BY

GEO. W. TILLSON, C.E.,

Member American Society of Civil Engineers.

FIRST EDITION.

SECOND THOUSAND.

NEW YORK:
JOHN WILEY & SONS.
LONDON : CHAPMAN & HALL, LIMITED.

Library

TE

250
.T58

Copyright, 1900,

BY

GEO. W. TILLSON.

ROBERT DRUMMOND, PRINTER, NEW YORK.

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Transport.

COLLEGE OF CIVIL ENGINEERIR. STATE UNIVERSITY OF KENTURES

Lexington, .. Kentecky:

PREFACE.

IN presenting this work to the public the author does so in the hope that it will answer some questions that have been presented to him during the past, and whose solution was only obtained by actual experience.

Fifteen years ago there was probably less literature extant upon the subject of street pavements than upon any other one branch of the engineering profession. Such great advance has been made in pavement construction during that period that works of that day are practically useless at the present time, except as records of what has been done.

An active participation in the construction of municipal public works, particularly in pavements, during the past twenty years has seemed to justify the author in producing this book in order to show not only what is being done at the present time in pavement construction, but also the evolution of the modern city street from the rude roadways of centuries ago.

Much time has been spent in historical research, and in Chap. ter I will be found a collection of facts that makes a fairly well. connected history of pavements and roads.

It would be useless to enumerate all the works that have been consulted in the preparation of this volume, as they include encyclopedias, dictionaries, scientific works, technical journals, society and official reports, special reports of consular agents and official committees, magazines, popular publications, and in fact all literature that would furnish information on the subject. Unreliable statements have either been rejected or given for what they were worth.

The author is greatly indebted to consular agents and city of

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