NAVIGATION, MANUFACTURES, AND RAILWAYS. 
BY THOMAS TREDGOLD, CIVIL ENGINEER, 
MEMBER OF THE INSTITUTION OF CIVIL ENGINEERS; AUTHOR OF ELEMENTARY PRINCIPLES OF CARPENTRY 
A PRACTICAL TREATISE ON THE STRENGTH OF IRON, &c. 
A NEW EDITION 
ENLARGED BY THE CONTRIBUTIONS OF EMINENT SCIENTIFIC MEN, AND EXTENDED 
TO THE SCIENCE OF 
team #a\ial Architecture. 
REVISED AND EDITED 
BY W. S. B. WOOLHOUSE, F. R. A. S., &c., 
ACTUARY TO THE NATIONAL LOAN FUND LIFE ASSURANCE SOCIETY. 
IN TWO VOLUMES,