



Produced by Richard Tonsing, Juliet Sutherland and the
Online Distributed Proofreading Team at http://www.pgdp.net









TRANSACTIONS

OF THE

AMERICAN SOCIETY

OF

CIVIL ENGINEERS

(INSTITUTED 1852)

       *       *       *       *       *

VOL. LXX

DECEMBER, 1910

       *       *       *       *       *


Edited by the Secretary, under the direction of the Committee on
Publications.

Reprints from this publication, which is copyrighted, may be made
on condition that the full title of Paper, name of Author, and page
reference are given.

NEW YORK

PUBLISHED BY THE SOCIETY

       *       *       *       *       *

1910

       *       *       *       *       *

Entered according to Act of Congress, in the year 1910, by the AMERICAN
SOCIETY OF CIVIL ENGINEERS, in the Office of the Librarian of Congress,
                            at Washington.

       *       *       *       *       *

 NOTE.--This Society is not responsible, as