The transcript of this letter is not available online on Ɛpsilon.
Please cite as “Herschel11581,” in Ɛpsilon: The Sir John Herschel Collection accessed on 28 March 2024, https://epsilon.ac.uk/view/herschel/letters/Herschel11581
Asks for the use of an invariable pendulum and a clock from the Board of Longitude so that G. B. Airy and William Whewell can carry out experiments to measure the change in gravity and the mean density of the earth, in a Yorkshire coal mine.
Record created for the Calendar of the Correspondence of Sir John Herschel (CUP: Cambridge), 1998 by Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds
Digital record created by Dr Marvin Bolt and Steven Lucy at the Webster Institute of the Adler Planetarium
Converted to TEI by Michael Hawkins, Epsilon Project, Cambridge University Library
John Herschel Project[View Ɛpsilon collection]