A description of a new instrument, invented by John Hadley, Esq., for taking the latitude or other altitudes at sea
Subtitle: with directions for its use ...
Contributors: Hadley, John, 1682-1744; Vallancey, Charles, 1721-1812, annotator
Publisher: Printed by E. Say, in Ave-Mary-Lane
Published: 1748
Place of publication: London
Language: eng
Number of pages: 30
Subjects: Quadrants (Astronomical instruments); Early works to 1800; Navigation; Nautical instruments
Other titles: Description of a new instrument for taking the latitude or other altitudes at sea
Notes: Attributed to George Hadley, brother of John Hadley. Cf. Halkett & Laing.

Signatures: A-D⁴.

Engraved folded frontispiece of Hadley's quadrant, signed: J. Smith sculpsit.

Halkett & Laing (2nd ed.) II, 40