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.
Showing 81–100 of 168 items
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].
Sends GA a spectrum photograph, and explains how JH obtained it.
Sends GA two more spectrum photographs [see JH's 1842-4-10], and believes that these may lead the way to color photography.
Provides the best values available for dispersion and separation, which will allow GA to calculate what he needs [see GA's 1845-4-4].
Asks a number of questions that need answers before considering the purchase of a large new telescope for the Royal Observatory.
Thanks GA for his contributions to some material JH is compiling; asks about date of Board of Visitors meeting.
Thinks the building changes proposed [see GA's 1848-1-21] are fine; explains JH's position on the whole matter.
JH begs to differ with GA and Isaac Newton on the moon's motions [see GA's 1848-10-13]; warns GA against accepting J. H. Seyffert's work as accurate.
Surprised by GA's unhappiness with George Merz [see GA's 1848-2-17]; suggests GA seek information from Thomas Maclear at the Cape, who is getting a new telescope from George Merz.
Willing to let GA choose the best objective lens [see GA's 1848-4-5]; then JH offers another possibility; all are ill at Collingwood.
Further to resolving the time conflict [see GA's 1847-5-15] and sending out invitations for Visitation Day.
Gives GA an address for the next while, and tells GA what JH has done about invitations for Visitation Day [see JH's 1847-5-19].
Clarifies the agenda for the next R.A.S. meeting, and reports that the large refracting telescope is on the way to the Cape.
Is aware of T. J. Hussey's drawings [see GA's 1848-2-1]; needs information about P. A. Hansen's lunar theory for an appreciation JH is to provide.
Personally would like to have F. W. A. Argelander's work printed [see GA's 1848-9-13], but will need to get a wider opinion; also asks about sharing money available from the Admiralty [see GA's 1845-10-24].
Still arguing that Isaac Newton is not correct concerning the moon's motions [see GA's 1848-10-24].
Is skeptical of the American observations [see GA's 1845-12-8], and reports other observations communicated to JH.
About family health; JH's star counting has led him to believe that all stars are part of one sidereal system [the Milky Way].
Will send measurements of the requested stars [see GA's 1847-5-15] as soon as JH can consult the appropriate papers.