Comments on the work of the Standards Commission, hoping that it will move quickly to a conclusion [see GA's 1838-11-14].
Showing 21–38 of 38 items
Comments on the work of the Standards Commission, hoping that it will move quickly to a conclusion [see GA's 1838-11-14].
Replies to GA's request for meeting dates [see GA's 1838-11-14], and suggests ways to shorten the work of the commission [see JH's 1838-11-16].
Agrees to GA's suggested dates [see GA's 1838-11-20]; comments on several approaches to defining a standard of weight.
Describes the tests and adjustments JH has recommended to Thomas Maclear to try to remove anomalies from the functioning of the transit circle at the Royal Observatory, Cape of Good Hope; also comments on the beauty of some southern nebulae.
Congratulates GA on being honored by H. M. Government [GA was offered a knighthood, which he declined], and of being appointed Astronomer Royal, and further tells GA about some of JH's observations, and the instruments in use [letter finished 11 Oct.].
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.
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.
About astronomical matters, such as parallax and variable stars.
Comments on GA's and Edward Sabine's work on the figure of the earth; describes some results JH obtained from using quartz for polarizing light, and is unhappy with the proposed recipient of the R.A.S. medal, M. C. T. Damoiseau, whose lunar theory JH cannot understand.
An extensive discussion of the best way of presenting the results produced from the observations made at the Royal Observatory at Greenwich, together with comments about the duties and responsibilities of the Astronomer Royal.
Is trying to clean up JH's nebulae observations preparatory to leaving for the Cape; comments on communications from F. G. W. Struve about double stars.
Is grateful for GA's encouragement to prepare JH's nebulae observations for publication before leaving for the Cape; it now seems clear to JH that he cannot leave before 1833; JH has had further communications from F. G. W. Struve about double stars [see JH's 1832-5-4].
Hugh Percy has approved the arrangements, which JH had made with R. A. Cauchoix [see JH's 1833-9-29].
Brief note supporting GA's medal recipient ideas [see GA's 1839-12-16], and adding some of JH's ideas.
Sets out JH's preferences with regard to developing a system of reductions of astronomical observations that could then be easily applied.
About the prices of telescope mirrors, and specifically the one of T. J. Hussey; recommends use of certain stars to test the optical quality of the mirror.
Thanks GA for the second volume of his observations; wishes the publications of the Astronomer Royal were as good; adds some comments on polarization of light by liquids, and then talks about observing Georgium Sidum [Uranus], and deals with the orbits of satellites of planets generally.
Asks a number of questions about a projected South Polar magnetic expedition.