Regarding the 'chilled' casting of a telescope.
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Regarding the 'chilled' casting of a telescope.
Tells GA about the internal counterpoise system in use in some German telescope mountings, and includes a diagram; JH knows nothing about chilling speculum metal [see GA's 1849-3-7].
Asks JH's opinion about GA's plan not to print a separate volume of magnetic and meteorological observations for 1848.
Some concerns about GA's intent of attaching magnetic and meteorological observations to the R.A.S.'s Astronomical Observations [see GA's 1849-3-28].
Asks GA if he knows of any rules or pitfalls in calculating time from earlier times [even B.C.] to the present.
Will reconsider the proposal about printing observations [see JH's 1849-3-29], and get back to JH.
Has little advice to offer JH about time calculation [see JH's 1849-3-29], except for fairly standard reminders.
Glad to hear that Margaret Louisa [JH's daughter] is coming to visit GA's family; could JH send along the key to the R.A.S. strong box?
Responds to GA's 1849-4-4, and sends the key.
Some responses to the question of copyright and of revision of articles prepared for the Encyclopaedia Metropolitana.
Is making a case for JH's priority claims with regard to the means of determining double star orbits, in conflict with Yvon Villarceau.
A note about forwarding papers related to the double star question [see JH's 1849-4-9].
No summary available.
Returning papers of Yvon Villarceau and an abstract of them, together with comments on them.
Extended comments about some of GA's statements in GA's abstract of Yvon Villarceau's papers on double stars [see GA's 1849-4-11].
A note of thanks for a copy of JH's Outlines Astr.
No summary available.
No summary available.
No summary available.
No summary available.