Table of contents
Recently Patented Inventions
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Notes and Queries
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Moving the Central Draw Span of Seventh Avenue Bridge - pp17 - 18
doi:10.1038/scientificamerican07141894-17
An Excavator for use in Harbors, Rivers, Etc - p20
doi:10.1038/scientificamerican07141894-20b
The Reagan Marine Water Circulating and Shaking Grate - p21
doi:10.1038/scientificamerican07141894-21a
Improved Drilling Machine for Boilers - pp23 - 24
doi:10.1038/scientificamerican07141894-23