Item #22752 Tables of Difference of Latitude and Departure : Constructed to every Quarter of a Degree of the Quadrant, And continued from One, to the Distance of One Hundred Miles or Chains : - of LOGARITHMS, from 1 to 10,000 :- and of Artificial Sines, Tangents, and Secants. Carefully Revised and Corrected. Robert Gibson, John Robertson.
Tables of Difference of Latitude and Departure : Constructed to every Quarter of a Degree of the Quadrant, And continued from One, to the Distance of One Hundred Miles or Chains : - of LOGARITHMS, from 1 to 10,000 :- and of Artificial Sines, Tangents, and Secants. Carefully Revised and Corrected
Tables of Difference of Latitude and Departure : Constructed to every Quarter of a Degree of the Quadrant, And continued from One, to the Distance of One Hundred Miles or Chains : - of LOGARITHMS, from 1 to 10,000 :- and of Artificial Sines, Tangents, and Secants. Carefully Revised and Corrected

Tables of Difference of Latitude and Departure : Constructed to every Quarter of a Degree of the Quadrant, And continued from One, to the Distance of One Hundred Miles or Chains : - of LOGARITHMS, from 1 to 10,000 :- and of Artificial Sines, Tangents, and Secants. Carefully Revised and Corrected

Philadelphia: Joseph & James Crukshank 1803. [1]-152 pages plus 13 folding engraved plates. Later calf spine and corners over marbled boards. New endpapers when rebound. Browned throughout but not brittle. Very good. Boards. [22752]


Rink (Technical Americana #2396) notes that Robert Gibson's "A treatise of practical surveying... The 8th ed... with alterations and amendments, adapted to the use of American surveyors." includes the present work bound at the end, and we have seen it similarly appended to other editions. It was apparently first published in Philadelphia in 1785 as a 90 page appendix to Gibson's work. Sometimes listed as a separate work (and attributed to John Robertson, see Rink #2375, 2387, and 2392), something we find appropriate given the separately printed title page, and the practical need for periodic revisions necessary to correct errors or expand the tables (an issue for many early printed tables). While the theory of surveying might not change dramatically, using the most current tables was most certainly important.

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