The fourth number of part four is now published; the Smith, Elder & Co. account is presented.
The fourth number of part four is now published; the Smith, Elder & Co. account is presented.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.
Gives the parallaxes of a few southern stars obtained from his own mural circle. Has sent his memoir on Alpha Centauri to the R.A.S.
Observations on double stars.
Is gratified that JM is taking an interest in double stars. Comments on some of the observations and time of their orbits.
Impressed by accuracy of actinometer measurements made by JK, Joseph Dayman, and P. A. Scott from Feb. to Sept. 1841 at JK's observatory at Rossbank [Tasmania]. Suggests methods to improve readings and simplify reductions.
Sends JH samples of his calotypes. Off to Germany on a photographic expedition.
Urged by G. B. Airy, ES withdraws earlier letter to JH and encloses letter with ES's opinions regarding continuance of [magnetic and meteorological] observations.
Sends several samples of ferrocyanide JH had requested.
Is applying for vacant professorial chair in astronomy. Wants testimonial from JH in his support. Attached note of JH is negative in this regard.
Still pursuing vacant professorial chair in astronomy. Wants JH's testimonial. Sends his qualifications and description of recent activities in astronomy.
Stresses importance of development and phases of periodic phenomena on earth's surface. Magnitudes of stars are the only observations JH is doing. Asks for help in planning trip on continent for three of his daughters and their governess.
Instructions for preparing liquid for the actinometer. Describes 'very strange' experiments on the spectrum as well as an 'unusual' cloud formation.
Sends GA a spectrum photograph, and explains how JH obtained it.
Sends GA two more spectrum photographs [see JH's 1842-4-10], and believes that these may lead the way to color photography.
Plans to calculate Gamma Virginis orbit. Received WS paper on astronomical observations. Suggests WS look for a house in Kent after learning plans to move near London.