TA 180

•H37

1900

OF

ENGINEERING SPECIFICATIONS

AND

CONTRACTS,

DESIGNED AS A

TEXT-BOOK AND WORK OF REFERENCE FOR ALL WHO MAY
BE ENGAGED IN THE THEORY OR PRACTICE

OF ENGINEERING.

wuhlenberg

BY

LEWIS M. HAUPT, A.M.; C.E.

LATE PROFESSOR OF CIVIL ENGINEERING, UNIVERSITY
PENNSYLVANIA; MEMBER ISTHMIAN CANAL COMMISSION.

OF

"Scientiarum omnium robur instar fascis illius senis; non in singulis
bacillis sed in omnibus vinculo conjunctis."—BACON.

EIGHTH EDITION

PHILADELPHIA:

HENRY CAREY BAIRD & CO.,

INDUSTRIAL PUBLISHERS, BOOKSELLERS AND IMPORTERS,

No. 810 WALNUT STREET.

1900.

Entered according to Act of Congress, A. D. 1878, by L. M. Haupt, in the office of

Librarian of Congress, at Washington.