Will send the Nautical Almanac to Smith, Elder and Co. Is pleased they agree on the naming of the asteroids. Gives readings for the approaching transit of Mercury.
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Will send the Nautical Almanac to Smith, Elder and Co. Is pleased they agree on the naming of the asteroids. Gives readings for the approaching transit of Mercury.
About the naming of asteroids.
Has received a letter from U. J. J. Leverrier requesting a name for No. 59; sees difficulties; so would JH suggest a name. Has sent the Nautical Almanac supplement and a memoir by Yvon Villarceau to Smith, Elder and Co.
About WL's activity in setting up his observatory.
Sends series of solar heliographs. If further suggestions for improvement of these are noted, please send them. Is preparing to photograph Dec. 31 eclipse.
Has no suggestions to improve photographs. Wants to determine whether the degradation of light from center to edge of sun is 'real.' Does not think sun's size affects focus.
Finds JT's work on thermotics 'highly interesting,' although criticizes measurements of 'tenuity' of vapor, and explanation of scattering of sunlight and formation of corona around moon during eclipse.
Reply to JT's 'Remarks on Radiation and Absorption.' Calls non-absorption of air and vapor key to understanding meteorological phenomena. Remarks on 'radiant heat' from moon.
Gives account of observations on lunar radiation, including detailed description of experiments.
Does not believe surface of moon can radiate cold; perhaps new moon can. Explains this geometrically.
Clarifies that JT does not believe moon radiates cold itself, but effects are 'as if' it did. Relates this to atmosphere.
Thanks JH for compliments on his book [Theory of Equations]. Requests JH's signature for his application to the R.S.L.
Is sending him an engraving of his late father. Sees that JH has finished his work he told him about.
Asking JH to accept his book on the rock crystals.
Thanks GD for memoir on the subject of geological transformations.
Thanks for pictures of Mars; speculates on the atmospheres of some planets.
Is pleased that JH likes his plates of Mars. Has a great collection of drawings of Mars but only a few of Venus. Hopes by the Spring to have the photoheliograph working. Has just completed his volume on the eclipse for 1860.
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