|Title||Unpublished paper, 'On magnetic variation' by John George Hartley|
|Creator||Hartley; John George (fl 1846)|
|Description||Hartley attempts to produce an estimation of the precise value of the equinoctial or astronomical year. |
Followed by a covering letter addressed to P M [Peter Mark] Roget.
Received 16 October 1846.
|Physical description||Ink on paper|
|Digital images||View item on Science in the Making|
Fellows associated with this archive
|NA6616||Roget; Peter Mark (1779 - 1869); physician and philologist||1779 - 1869|