RefNo | MS/257/5/37 |
AltRefNo | Sa.1717 |
Previous numbers | ES5/12/1717 |
Level | Item |
Title | Copy of a letter from James Thomas Walker, Dehra Doon [Dehradun], to Balfour Stewart |
Date | 3 January 1868 |
Description | Regarding Walker’s annual report to the government of India. Discussion regarding pendulum operations and the determination of expansions by vibrations under the natural pressure, and comparison with General [Edward] Sabine’s results. Comparison of results between Masoori [Mussoorie] and Dehra Doon [Dehradun]. Discussion regarding the temperature of the pendulums and reference of the ‘ordinary diurnal fluctuations’ and ‘diurnal variation of the temperature’. Walker asks Stewart to suggest a method to determine the temperature of a pendulum and describes the method. Discussion regarding Captain [James Palladio] Basevi pendulum experiments. Remarks on errors within pendulum observations. Discussion regarding Stewart’s ball observations at Kew, Sabine’s deductions of the expansion, and [George Biddell] Airy’s [showing] discrepancies in experiments to determine differences of expansion of two pendulums in the effort to determine ‘the mean density of the earth’.
Discussion regarding magnetic results at [Dehradun] and their confirmation by Mr [Charles] Chambers in Mumbai, previously known as Bombay]. Discussion regarding Basevi’s recent trip to [Mumbai] and his horizontal force observations. Walker discusses instruments used to determine time and latitude. Reference to the trigonometrical survey. |
Extent | 11p |
Format | Manuscript |
PhysicalDescription | Ink on paper |
AccessStatus | Open |
Fellows associated with this archive
Code | PersonName | Dates |
NA6271 | Walker; James Thomas (1826 - 1896) | 1826 - 1896 |