Excusing JH for returning to Slough suddenly before leaving for Hanover.
Excusing JH for returning to Slough suddenly before leaving for Hanover.
Regarding his request for JH's support for his candidature for the chair of Natural Philosophy at Edinburgh University. Reasons why he thinks JH should give him a testimonial.
Is sending an unpublished pamphlet on dioptric lights and would be glad of his opinions as he is claiming public recognition.
Thanks for his letter regarding the dioptric lights. Gives his own views as to their importance.
Has heard that he has been suffering from the cramp and suggests a few remedies that he himself has found beneficial.
Regarding DB's views on support for JH in the presidency of the R.S.L.
Sends an abstract of his paper on observations relating to the practical construction of telescopes [JH's 'Practical Rules,' 1822]. Would like 25 copies for distribution. His recent experiments with polarized light.
Regarding terminology for polarization and refraction of light. DB's statement concerning the experiments of E. L. Malus and light through crystals.
Gratitude for gift of JH's Cape Results, not yet received. Send copy for [St. Andrews] University through Smith, Elder & Co., booksellers to the university. Concurs with JH on names for asteroids.
Sends JH's 1823 paper 'Absorption of Light by Coloured Media' to Royal Society of Edinburgh. Approves DB's illustration of polarized light in mineral apophyllite. Corrects DB's quotation from JH's letter regarding crystals observed on Mont Blanc.
Vol. 6 and 7 of F. W. Bessel's observations. Did DB receive JH's paper?
JH's theory of colors. Edward Troughton has DB's instrument one-third completed. When will DB want JH's encyclopedia article on 'Variation'?
Sends circular of F. W. Bessel's 'Declinations.' Sent paper on 25 July for Royal Society of Edinburgh, similar to DB's paper outlined in previous issue [of Edinburgh Journal of Science]. Argues for continuity of color spectrum versus 'per saltum' transitions.
Asks DB to write a paragraph explaining the novelty of the photographic process of '[Andrew?] Ross and [Thomas?] Thomson' as distinct from [Nicéphore] Niépce's albuminous process.
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