Has received GA's paper on spectral lines and is amazed that it is possible to see a spectrum in the light from faint nebulae.
Has received GA's paper on spectral lines and is amazed that it is possible to see a spectrum in the light from faint nebulae.
Is sending his lectures on magnetism he gave at Cambridge.
Has read the syllabus of GA's lectures on magnetism; it reminds JH of his attempt to solve the problem of 'Mahomet's coffin', which JH still believes would work.
Concerning JH's Mahomet's coffin theory.
Is considering a new edition of Outlines Astr.[?] and wants to provide the latest determinations of the periods of rotation of the planets.
Gives information on the rotational periods of Mars, Jupiter, and Saturn [see JH's 1869-5-30].
Regarding JH's letter to the Times on the gold coinage question.
Continues to rail against the imposition of the metric system in India; argues against any change in the British sovereign coin.