London
Found in 1999 Collections and/or Records:
Correspondence on time balls and signals, 1870 - 1875
Correspondence on time balls and signals, 1858 - 1860
Correspondence on time balls and signals, 1861 - 1866
Correspondence regarding William Lester, 1821
The letters concern his claims for the full reward offered for the discovery of an accurate method of finding longitude at sea.
Correspondence with scientific societies, 1860 - 1863
Correspondence with Thomas Lynn relating to his star tables, 1821 - 1827
Correspondence regarding various astronomical and nautical tables.
Correspondence with William Mitchel on the question of remuneration for his work on an improved quadrant, 1765 - 1786
Miscellaneous petitions and memorials making requests of the Board of Longitude.
Correspondence with William North, 1817 - 1821
Concerning his claims for remuneration for his method of taking lunar observations, etc.
Cover letter from Mr Croker to Dr Thomas Young, 1822-07-11
Concerning the letter from Thomas Bannerman at [RGO 14/37: 299-300].
Cover letter from Sir John Barrow to Dr Thomas Young, 1819-07-25
Originally enclosing a letter by G. Davidson for presentation before the Board of Longitude.
Cover note from John Wilson Croker to Dr Thomas Young, 1827-10-04
Enclosing a letter from Thomas Jordan; see [RGO 14/24: 433-434].
David Mollard on the variation of the magnetic needle, 1824-04-24
Correspondence regarding the effect of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
David Thomas on perpetual motion, 1821
David Thomas's description of an arrangement of the magnetic needle as a compass for ascertaining the dip, 1819 - 1821
Correspondence regarding the effect of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
Description of a nautical instrument invented by F. Parkinson, 1822-09-04
Letter and description of an instrument from Parkinson, with two related letters from John Barrow and Dr Thomas Young.
Description of Messrs Martin and Jordan's new terrestrial globe to show longitude, 1794-12-16
With drawings of the same.
Description of Mr Arnold's escapement, 1804-06 - 1804-11
Description of Mr Arnold's time-keeper, 1805-03-05
Description of 'The Marine Transit', 1812-10-17
Includes a prospectus, a drawing and a description of his timekeeper, which was known as 'The Marine Transit'; with related tables.