Tuesday, March 24, 2009

Primary Sources Online

The Navigation Workbook, ca. 1820, of Joseph Robinson is now online at the request of the Education Department who plans to use the workbook as part of an off-site math class. The workbook contains rules and problems for plane, traverse, Mercator's current and middle latitude sailing, instructions for keeping a journal, description and use of Hadley's quadrant, use of log line and half-minute glass, rules for correcting dead reckoning, illustration, and sketches. It also has some great drawings. (this one of the mariners compass is now my desktop background)

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