No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
Recommends buying optics for 7.5-inch telescope from Metz and Mahlers in Munich and having those mounted in London.
Both JH and his wife, Margaret, are very concerned about the health of Madame Gerlach, the aunt of NS. Details are provided.
Urges doubling number of lunar observations.
Expresses GW's concern if the British Museum were to require him to pledge to do no remunerative work outside what they would pay GW to do. GW, however, is prepared to make that pledge, if necessary.
Construction of JH's new instrument for photographing spectral lines is still incomplete, and A. E. Becquerel has already announced discovery. JH will return £100 granted to JH by R.S.L.
Writing memoir of James Grahame. Asks JH to send list of all Grahame's publications, copies of his work, and any available reviews.
Edited the last volumes of the Encyclopaedia Metropolitana. Needs JH to summarize main points of his treatises on light and sound for the general preface.
Saw article in the [London] Times about Lord Rosse's telescope. Has received a letter from [James] South. Asks for information from JH for private use. [Francesco] del Vico has observed triple stars, but HS thinks the telescope by [R. A.] Cauchoix is flawed.
Relinquishes R.S.L. Donation Fund for spectrometer [see JH's 1842-6-1], because [A. C.] Becquerel's research makes it obsolete.