Pledger, E., & Meadows, W. (1731). A brief DESCRIPTION of A NEW INVENTED, SMALL, yet ACCURATE Astronomical Quadrant: Particularly calculated for Curious Observations at SEA, But equally useful at LAND: AND THAT Either by DAY or NIGHT. Together with some useful PROBLEMS for finding the LATITUDE In Failure of a Meridian ALTITUDE; Propos'd in such a Manner as to make the Calculation Easy and Expeditious; and freed from some Errors they were before liable to. WITH MAPS of the STARS, Laid down in a different, But more intelligible Manner than usual, and design'd as a Guide to the Knowledge of them.

Pledger, Elias, and William Meadows. A Brief DESCRIPTION of A NEW INVENTED, SMALL, yet ACCURATE Astronomical Quadrant: Particularly Calculated for Curious Observations At SEA, But Equally Useful At LAND: AND THAT Either By DAY or NIGHT. Together With Some Useful PROBLEMS for Finding the LATITUDE In Failure of a Meridian ALTITUDE; Propos'd in Such a Manner As to Make the Calculation Easy and Expeditious; and Freed From Some Errors They Were Before Liable To. WITH MAPS of the STARS, Laid Down in a Different, But More Intelligible Manner Than Usual, and Design'd As a Guide to the Knowledge of Them. 1731.

Pledger, Elias, and William Meadows. A Brief DESCRIPTION of A NEW INVENTED, SMALL, yet ACCURATE Astronomical Quadrant: Particularly Calculated for Curious Observations At SEA, But Equally Useful At LAND: AND THAT Either By DAY or NIGHT. Together With Some Useful PROBLEMS for Finding the LATITUDE In Failure of a Meridian ALTITUDE; Propos'd in Such a Manner As to Make the Calculation Easy and Expeditious; and Freed From Some Errors They Were Before Liable To. WITH MAPS of the STARS, Laid Down in a Different, But More Intelligible Manner Than Usual, and Design'd As a Guide to the Knowledge of Them. 1731.