@article{537026,
      recid = {537026},
      author = {Walker, Ralph.},
      title = {A treatise on magnetism, with a description and  explanation of a meridional and azimuth compass, for  ascertaining the quantity of variation, without any  calculation whatever, at any time of the day. Also  improvements upon compasses in general. With Tables of  Variation, for all Latitudes and Longitudes. By Ralph  Walker, of Jamaica. [electronic resource] :},
      publisher = {printed by R. Hindmarsh, printer to his Royal Highness the  Prince of Wales, Old-Bailey. sold by George Adams, No. 60,  Fleet-Street; Peter Elmsley, No. 87, Strand; John Sewell,  No. 32, Cornhill; David Steel, No. 1, Union-Row, Little  Tower-Hill; and; John and Arthur Arch, No. 23,  Gracechurch-Street, Corner of Lombard-Street,},
      address = {London :},
      pages = {9,[4],10-226,[2]p.,plates ;},
      year = {1794},
      note = {The final leaf comprises the directions to the binder.},
      url = {http://library.usi.edu/record/537026},
}