The description and use of a new instrument, entitled The mariner's journalet  Constructed and sold by Robert Blackburne, teacher of navigation, &c. at No. 75, near Durham-Yard, in the Strand.

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Blackburne, Robert, teacher of mathematics at Liverpool.

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The description and use of a new instrument, entitled The mariner's journalet Constructed and sold by Robert Blackburne, teacher of navigation, &c. at No. 75, near Durham-Yard, in the Strand.