Reference numberMS/119/2/47
TitleSecond half of letter from Humphrey Lloyd, 17 Fitzwilliam Square, Dublin to Charles James Buchanan Riddell
Date8 January 1844
Description[This is a continuation of MS/119/2/48]

Discussion on the use of two iron bars. Lloyd notes that this would be an obvious improvement. Professor [Alexander Dallas] Bache was the first to adopt this. Discussion on new instruments. Riddell discusses adopting the collimator chiefs for the absolute declination. The adjustments and formula for computation remain the same as before. Discussion on inducing the coefficient.
Physical descriptionInk on paper
Access statusOpen
Related records in the catalogueMS/119/2/48
Fellows associated with this archive
NA8252Lloyd; Humphrey (1800 - 1881)1800 - 1881
NA7327Riddell; Charles James Buchanan (1817 - 1903)1817 - 1903
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