Thanks GA for all his efforts on Thomas Maclear's behalf [see GA's 1839-2-25]; comments on some developments in photography, including the work of Nicephore Niepce done in approximately 1826.
Showing 41–60 of 425 items
Thanks GA for all his efforts on Thomas Maclear's behalf [see GA's 1839-2-25]; comments on some developments in photography, including the work of Nicephore Niepce done in approximately 1826.
About the question of an astronomer for a vacant position at Kew Observatory.
No summary available.
Sympathizes with GA in the family sorrow [deaths of GA's sons Arthur and George]; JH complains that house hunting, and other matters, are keeping him from important work.
George Everest-Thomas Jervis affair. Observations on the production of color by chemical rays.
About astronomical matters, such as parallax and variable stars.
Brief note supporting GA's medal recipient ideas [see GA's 1839-12-16], and adding some of JH's ideas.
Has a problem with the explanation of interference bands produced by mica being placed between the eye and prism-produced dispersion; the explanation is Baden Powell's.
Writes to supply GA with an address for a reply to JH's 1840-5-16.
Thanks GA for the time and trouble GA took in writing about interference bands [see GA's 1840-5-17]; JH's wife, Margaret, is making many visits to the dentist.
A note agreeing with GA about prism interference [see GA's 1840-5-20].
Comments on a proposed request for a government grant to establish a magnetic and meteorological institute.
GA's correspondence with [R.S.L. president] Lord Northampton [S. J. A. Compton] will be read before Physical Committee. JH favors establishing national physical observatory and experimental institute, but wishes plan had been discussed more fully. Proposes sites, procedures, and instruments for magnetic and meteorological observations in Britain. Ideas for experimental institute.
Responds to GA's circulated material for the Standards Commission; suggests time to digest the information.
Provides information [see GA's 1840-8-13] based on equipping the Breslau Observatory; also comments on lawyers, meteor showers, and photography.
Is sending comments on GA's proposals [see GA's 1840-10-13]; JH has been asked about obtaining a heliometer from Munich; seeks GA's opinion on the quality of the brass workmanship in Munich.
Provides detailed comments on GA's circulated material on standards [see JH's 1840-10-30]; tends toward maintaining basic units but finding decimal relationships between them.
Agrees to proposed meeting date [see GA's 1841-1-16], and encourages GA to come with a draft final report prepared.
A note to accompany proposals for the Standards Commission to consider [see GA's 1841-2-17]; twenty pages of proposals are appended.
Has received material sent by GA [see GA's 1841-3-20]; comments on the report and JH's unavailability for meetings of the Standards Commission in the near future.