Henry Gregory (instrument maker)

For the Australian politician, see Henry Gregory (politician).

Henry Gregory
Born	1744
Died	1782
Occupation	Mathematical instrument maker

Henry Gregory (1744–1782) was a mathematical and optical instrument maker. He was in business from c. 1750–1792 from premises in Francis Court, Clerkenwell, London and an establishment known as "The Azimuth Compass" in Leadenhall Street, London. His company later became known as Gregory and Son.

Gregory manufactured navigational instruments, including quadrants of the type invented by John Hadley and compasses. One of his azimuth compasses traveled with the explorer James Cook on his second voyage to the southern Pacific Ocean in 1772–1775. An azimuth compass is a compass fitted with vertical sights, used to take the magnetic azimuth of a star or planet.

References

Clifton, Gloria (1995). Directory of British Scientific Instrument Makers 1550-1851. London: Philip Wilson. pp. p. 119. ISBN 0-302-00634-6.

Persondata
Name	Gregory, Henry
Alternative names
Short description
Date of birth	1744
Place of birth
Date of death	1782
Place of death