London
Found in 8 Collections and/or Records:
Letter from Le Duc Duhamel to Dr Thomas Young, 1827-10-23
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 Le Duc Duhamel to Dr Thomas Young, 1828-01-29
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 Le Duc Duhamel to Sir John Barrow, 1827-09-04
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 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 Le Duc Duhamel to the Board of Longitude, 1827-06-11
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 Le Duc Duhamel to the Board of Longitude, 1827-08-27
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 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.
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.