File:Factory and industrial management (1891) (14764395745).jpg

Identifier: factoryindustria15newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
THE EAST RIVER SUSPENSION BRIDGE, NEW YORK The second largest existing span, 1600 feet. The first steel wire suspension bridge ; com-pleted 1883. tion. To that period belong the still-existing bridge over the Danube,at Regensburg (completed 1146); the first bridge over the Elbe,at Dresden (completed 1260) ; a fine bridge over the Rhone, atAvignon (completed 1188) ; at Lyons (1265) ; over the Mosel, atCoblenz (1334) ; and the famous stone arch bridge over the Moldauriver, at Prague, in Bohemia, to build which required a longer time(145 years) than was required for the building of any other bridge inexistence. The construction was mostly under the direction ofmonks, at that age the only preservers of learning and of Roman tra-dition. The few large wooden bridges were primitive structures, held to-gether with the fewest iron bolts, and were repeatedly burned downand rebuilt during the frequent wars. That they were popularly ad- 9o8 EUROPEAN AND AMERICAN
Text Appearing After Image:
CAST-IRON !,i:il .1- UVER 1 H li SKVhKN Al CuAl liROOKDALK.The first iron bridge in the world. Span loo ft. 6 in.; compltted 1777. mired as masterpieces of the bridge-builders skill I know fron personal recollection of the long structures on piles and trestle piers, overthe Danube, at Vienna and Linz. So it was also with the woodenand pontoon bridges over the Rhine. The largest wooden spans werebuilt in Switzerland, where large timber was more plentiful than else-where, and some of these curious and very old structures, well pre-served, are still in use. No advance was made in theoretical knowl-edge through all that time. Flat, segmental stone arches w^ere firstused at the beginning of the twelfth century, in place of the halfcircle invariably used by the Romans. It did not signify, however,a better comj)rehension of the strains in arches, since the (iothicform was also frequently used, theoretically the most unfit for bridges.The great bridges of our time are of a material which the

Note About Images