Subject Source: Local sources
Found in 1 Collection or Record:
Letter and description of an instrument by James Shaw to George Gilpin, 1815-05-18
Reference Code: GBR/0180/RGO 14/45: 277-280
Scope and Contents
Concerning his method of determining the latitude and longitude at one observation, his improvements to quadrants and sextants, and his invention of an instrument for taking altitudes without a horizon.
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