Solar Dynamics Observatory

Practical Treatise on the Construction of Iron Highway Bridges Practical Treatise on the Construction of Iron Highway Bridges- Full text facsimile of Boller's 1876 publication. Also available in pdf and tiff formats. Madison Avenue Bridge Madison Avenue Bridge- Descriptive history and current conditions on the Madison Avenue Bridge over the Harlem River in New York City. University Heights Bridge University Heights Bridge- Descriptive history and current conditions of the swing bridge over the Harlem River in New York City designed by Boller.