. . "Description of a new instrument for taking the latitude or other altitudes at sea" . . . . . "A description of a new instrument, invented by John Hadley, Esq., for taking the latitude or other altitudes at sea : with directions for its use" . . . . "Early works" . . "A Description of a new instrument, invented by John Hadley, esq., for taking the latitude or other altitudes at sea, with directions for its use" . . . . . . . . "A description of a new instrument, invented by John Hadley, Esq. : for taking the latitude or other altitudes at sea : with directions for its use"@en . "Annotations (Provenance)" . . . .