Record

Reference numberMS/119/2/91
LevelItem
TitleLetter from John Henry Lefroy, Longwood, St Helena to Humphrey Lloyd, Trinity College, Dublin
Date18 June 1840
DescriptionLefroy discusses setting up a new observatory at Longwood St Helena. Lefory offers a letter of explanation until they can reduce the irregularities at the observatory. Acknowledges the vertical force instrument is perplexing him, as it shifted positions and moved, but the needle appears to be returning. Discussion on obtaining time of vibrations in a horizontal plane. Lefroy mentions changes being made to the magnet and the building which is not complete at present. Lefroy has gotten to the know the Island, and is convinced that it has perfect terrain for their experiment. Discussion on the advantages of Frances Plain, and other locations not yet visited.
Extent4p
FormatManuscript
Physical descriptionInk on paper
Access statusOpen
Fellows associated with this archive
CodeNameDates
NA7669Lefroy; Sir; John Henry (1817 - 1890)1817 - 1890
NA8252Lloyd; Humphrey (1800 - 1881)1800 - 1881
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