Thanks for paper on action of solar and electric light on vapors, which should give JT further insight into blue color of sky and polarization of skylight. Comments on the latter. JH's son [Alexander] is working hard at Glasgow.
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Thanks for paper on action of solar and electric light on vapors, which should give JT further insight into blue color of sky and polarization of skylight. Comments on the latter. JH's son [Alexander] is working hard at Glasgow.
Observations on subjecting carbonic acid to concentrated beam of an electric lamp. Records experimental result so far. Interested in ordinary dust particles under electric light.
Solar spectrum observations of John Herschel (son of JH) may have produced detection of the photosphere and corona at a time other than a total solar eclipse.
Requests permission to include extract from Prelim. Discourse in The Sixth English Reading Book.
Intends publishing a second edition of his paper on the Great Pyramid entitled 'Papers and Correspondence on the Pyramid.' Will respect JH's wishes on any points.
Notes strengths and weakness of heliometer for observing double stars. Calls it 'laborious, troublesome instrument.'
Encloses note from John Tyndall. Asks for interview. Wants to publish some of JH's papers in America. Purpose of EY's journal is to give double audience to scientific writers.
Writing about [hemianopsia] for doctor's thesis at Cambridge. Asks permission to quote report of JH's attack [see JH's 1868-5-4].
Received JH's permission to quote JH [in HA's thesis on hemianopsia] and describe JH's latest attack, including 'patches of coloured checquer work.'
Reports his observations of the nebula around Eta Argus. Provides a sketch. Has observed fifty other nebulae.
Provides further [see JH's son's 1868-11-23] observations, along with drawings, of the nebula around Eta Argus.