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• The ready observator : or an infallible method for determining the latitude at sea: By Altitudes of the Sun, At any Time of the Day, either Fore-Noon or After-Noon, Independant of a Meridional Observation. The Whole rendered peculiarly easy for Practice, and annexed with a compleat and correct Sett of all the necessary tables; By N. D. Falck, M.D
  by: Falck, Nikolai Detlef
  Published: (1778)
• A new and easy method of finding the latitude on sea or land : having two altitudes of the sun and the time elapsed between the two observations, measured by a watch or other time-keeper. By Samuel Dunn, Teacher of Mathematics
  by: Dunn, Samuel
  Published: (1778)
• Tables to improve and render more general the method of finding the latitude, by observing two altitudes of the sun, and the internal of time between : By John Brinkley, A.M. Andrew's professor of astronomy, Dublin; late Fellow of Caius College, Cambridge. Published by order of the commissioners of Longitude
  by: Brinkley, John
  Published: (1794)
• The practical observer : Or, The new method of finding the latitude at sea, by taking two altitudes, either in the forenoon or afternoon. And also, the new method of finding the longitude at sea, by taking the distance of the moon from the sun, or a fixed Star, &c. Rendered easy to the meanest capacity. By J. Hamilton Moore, author of the practical navigator, and seaman's new daily assistant. To which is added, the new Solar tables. and table of natural sines, with the use of the quadrant and sextant
  by: Moore, John Hamilton
  Published: (1775)
• Observations for determining the length of a degree of latitude in the provinces of Maryland and Pennsylvania, in North America : By Messieurs Charles Mason and Jeremiah Dixon. To which is prefixed an introduction: By the Rev. Nevil Maskelyne, B.D.F.R.S. Astronomer royal
  by: Mason, Charles
  Published: (1769)