LONGITUDE.
Dunn, Samel, d. 179).
A new and general introduction to practical astronomy ... The whole being designed, as a course of plain and easy instructions and opera- tions, preparatory to the discovery of the lon- gitude. By Samuel Dunn es.
London, Printed for the author; and sold by him, at n° 6, Clement's-Inn, Also sold by A. Smith, optician, near Charing-Cross, Strand; and at H. Gregory's mathematical shop, Leaden- hall-street. MDCCLYYTV. el77ha
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