AND GIRDER BRIDGES 363
Introduction--Centers--Mixing and Transporting Concrete; Cableway
Plants; Car Plant for 4-Span Arch Bridge; Hoist and Car Plant for
21-Span Arch Viaduct; Traveling Derrick Plant for 4-Span Arch
Bridge--Concrete Highway Bridges Green County, Iowa--Highway Girder
Bridges--Molding Slabs for Girder Bridges--Connecticut Ave. Bridge,
Washington, D. C--Arch Bridges, Elkhart, Ind.--Arch Bridge, Plainwell,
Mich.--Five Span Arch Bridge--Arch Bridge, Grand Rapids, Mich.