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The Tools of Science
The Mathematical Practitioners
Instruments of Metal
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18th century advertised American Andrew Ellicott Andrew Ellicott Douglass Anthony Lamb astronomical backstaff Bailey Baltimore Banneker Benjamin King Benjamin Warren Boston Gazette Bostonian Society Bowles brass Chandlee Charles clockmaker clocks and surveying collection Colonies compass card Conn Connecticut craftsmen Dartmouth College David Rittenhouse Davis quadrant dial diameter Doolittle England engraved Figure footnote George glass globes Greenough Halsy Hartford Heisely inscribed instruments and clocks Isaac James Halsy Jedidiah Baldwin John fl Joseph Frye Joseph Halsy Lamb Lancaster late 18th century London Long Wharf Mass Massachusetts Historical Society mathematical instru mathematical instrument maker mathematical practitioners ments nautical instruments Newport Nottingham Ohio optical Pennsylvania Philadelphia Photo courtesy Piatt Plymouth Portsmouth produced Salem Samuel Thaxter scientific instruments sighting bars signed sold struments surveying and nautical surveying instruments Surveying Surveying surveyor telescope Thomas Greenough U.S. National Museum USNM Walpole Washington William Williams wood wooden surveying compass York