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Nevil Maskelyne

Account of a new Instrument for Measuring Small Angles, Called the Prismatic Micrometer. By the Rev. Nevil Maskelyne, ... Read at the Royal Society, December 18, 1777
Account of a new Instrument for Measuring Small Angles, Called the Prismatic Micrometer. By the Rev. Nevil Maskelyne, ... Read at the Royal Society, December 18, 1777
Nevil Maskelyne