Durham
Found in 14 Collections and/or Records:
Letter and proposal from [George] Lindesay, 1826-01-11
On a method of finding latitude and longitude at sea in fog by two bearings of the sun, using a fog compass and a chronometer.
Letter from Charles Moody to the Board of Longitude, 1808-01-20
With an index of names.
Letter from George Flair to Sir Harry Parker, 1787-08-09
With an index of names.
Letter from George Hair concerning a magnetic needle, 1787-06-19
Correspondence regarding miscellaneous schemes and inventions.
Letter from George Hair on finding longitude independently of lunars, 1787-04-07
Sent to Sir Henry [Harold] Parker.
Letter from George Lindesay to Dr Thomas Young, 1827-12-28
Concerning a method of finding the time at sea without the latitude, and a method of finding the longitude by a lunar altitude. The letter includes a printed page outlining his method for longitude.
Letter from Le Duc Duhamel to the Board of Longitude, 1822-02-25
Six letters and two papers on his method of ascertaining the exact loss or gain of two chronometers, with a related newspaper extract.
Letter from Monsieur Duhamel, 1820-08-14
Two letters and a printed paper on finding the longitude by the moon's transit or distance from the meridian.
Letter from Monsieur Duhamel to Dr Thomas Young, 1820-05-03
Two letters and a printed paper on finding the longitude by the moon's transit or distance from the meridian.
Letters from observatories, 1872 - 1875
Miscellaneous scientific papers, 1794 - 1848
Monsieur Duhamel on an instrument for showing magnetic variation, 1820-05-15
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.
Papers on longitude and solar eclipses, 1849 - 1858
Printed paper outlining Duhamel's two new methods of ascertaining longitude, 1820-08-14
With an illustration.