Found some old packets of seeds of Protea yesterday and wonders if he would like them to be sown to see if they would germinate. Comments on some of the plants in his garden. Tried some Peruvian potatoes.
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Found some old packets of seeds of Protea yesterday and wonders if he would like them to be sown to see if they would germinate. Comments on some of the plants in his garden. Tried some Peruvian potatoes.
AH's college exams. Prefers that AH come home, rather than JH coming to Clapham and using Charles Pritchard's astronomy instruments. Describes 'revolving reflector' that JH designed for studying star spectra. Margaret and Duncan Stewart are coming to Clapham tomorrow for races. Many visitors at Collingwood.
Asks that various papers by JH be sent along with the R.S.P.T. to four foreign locations.
Thanks for MS's works, communicated through [Picot] Tremblay. Worries that JH has insufficient time and lags behind in the physical sciences. Comments on ideas put forward in 1824 by JH and discussed by MS. Has found MS's name connected with suspension bridge over Rhone River.
Reports JH's observations of a comet [Comet II Tebbutt ?] first seen from England ca. 29 June 1861. Remarks that it 'far exceeded in brightness any comet I have before observed.'
Sends a work on physical geography in return for a receipt of some lines of poetry.
Raised from his lethargy by the appearance of the comet; comments on the nature of the sun; can AD recommend a book on surveying for JH's son John.
No summary available.
Thanks for and comments on paper and lectures on 'diathermancy &c' of gases, scientific teaching, and solar chemistry. Regrets that JT mentioned all names connected with light research except JH's. Remarks on absorption of light, molecular vibrations.
Thanks SW for a copy of the reviews of JH's Meteorology and Physical Geography. Comments on related matters such as importing English birds into Australia, observations made by Alexander von Humboldt, and catching specimens behind a sailing ship.
More on lacunae in JH's set of MF's writings [see JH's 1838-10-3].
Thanks WJ for his papers on clouds [see WJ's 1861-7-21]. JH had not seen these, but praises their contents.
Asks R.S.L. Council to request Colonial Office to provide official recommendation to authorities in Malta for William Lassell, going there to observe.
Explains JH's objections to JL's shadow-extinction hypothesis of meteors. Believes that several sorts of meteors—magnetoelectric, stony, vaporous, etc.—exist.
Has got his paper on shooting stars. Comments on JL's theories of meteors. Pleased to hear a favorable account of Montague Lubbock.
Advises on the construction of the Melbourne reflecting telescope. Thinks [W. P.] Wilson should come to watch construction.
Outlines advantages of erecting great reflector in Melbourne [WW's colony] for observation of southern nebulae.
Does not possess the Transactions of the Astronomical Society, which contains JL's paper. Had to limit the scope of his article so could not deal with the point mentioned in JL's letter. Comments on P. S. Laplace's formula.
About the barometric formula for the measurement of heights.
AW's 'Thaumatrope' is ingenious, but applies only to periodic movement. JH aims to reproduce non-periodic motion. Commends AW's suggestion to employ government schoolmasters as meteorology observers.