Publisher's Synopsis
Excerpt from The Annual of Scientific Discovery: Or, Year-Book of Facts in Science and Art, for 1871, Exhibiting the Most Important Discoveries and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, Astronomy, Geology, Biology, Botany, Mineralogy, Meteorology, Geography, Antiquites
We can point with pride to some substantial engineering work of the past year: notably, the building, launching, and placing the great caisson at the Brooklyn terminus of the East River bridge. An extract from the report of Col. Roebling will be found in the present volume.
It is stated that the great central shaft of the Hoosac Tunnel has reached the grade of the tunnel feet below the natural surface.
The Broadway Underground Railway is well underway; the construction progressing while the thoroughfare above is crowded With its endless procession of vehicles.
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