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Daylight, twilight, darkness, and time; their distribution over the earth and their relationships to human affairs, by Lucia Carolyn Harrison.

Versuch einer magnetischen Theorie, in welchen nach gewissen Grund-Sätzen Anleitung gegeben wird ... = Specimen theoriµæmagneticµæ... / von Christoph Eberhard ... ; und nun aus dem Lateinischen ubersetzt von S.B.W.

The theory and practice of longitude at sea : comprehending the theory of the solar system, phaenomena of the moon, other planets and fixed stars, doctrine of parallaxes, time, and of the celestial sphere ... with other important improvements / by Samuel Dunn.

Theory & practice of finding the longitude at sea or land : To which are added, various methods of determining the latitude of a place, & variations of the compass; with new tables.

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.