Is grateful for the testimonial JH has given him; it will be useful.
Showing 61–80 of 94 items
Is grateful for the testimonial JH has given him; it will be useful.
Comments on sunspot activity.
Is glad he is pleased with the work of Balfour Stewart and himself. Has applied to R.S.L. for a further grant to carry on the observations and computations for another year. Intends to finance the last year himself. Since the death of his brother he has returned to business.
Announcing the death of her husband Augustus.
Has sent a work on the metric system in France, which includes JH's own valuable lecture.
Is grateful for his comments on his own paper on vision. Would he refer him to the work by Mr. Chopal on lens.
Relating his recent experiments in dioptrics. Encloses a model of his air-lens. Is grateful for the reference.
Report on late JH's manuscript on General History of Double Stars, bequeathed to R.A.S.
Encloses copy of JH's letter to R.A.S. [see JH's 1864-6-29] that accompanied JH's submission of W. L. Newman's tables for determining radii of aplanatic lenses. Suspects that there was more than one volume of tables.
Turned JH's mineral specimen over to N. S. Maskelyne. Poor health of GW's wife.
Sends prints of solar photographs taken last week at Kew, as requested by Warren de La Rue. Regrets that picture on 11 Feb. was unsatisfactory.
In Nov. 1864, R.A.S. council instructed secretary Charles Pritchard to write to JH regarding tables by late [W. L.] Newman of York, but JW finds no evidence that Pritchard complied. Cannot find Newman's tables. Pritchard may have taken them.
Requests publication of a notice of the recalculation by H. J. R. Petersen of the Gaussian constants of terrestrial magnetism.
Discusses WC's ideas on the causes of oceanic circulation. Notes that wind currents are easier to study than water currents. Glad WC got his specimens of Mediterranean water.
Has sent JH a copy of his new book [The Sun].
Thanks RP for sending RP's Sun. Suggests a theory that the solar corona, rather than originating in the earth's atmosphere, is produced by reflection from meteoric dust. Informs RP that he has completed a catalogue of all observations of double stars.
Raises objections to JH's theory of the solar corona. Discusses possible existence of extensive meteoric dust in the solar system. Requests permission to dedicate a book on sidereal astronomy to JH. Asks JH whether his father in later years always used a front focus for his large telescopes and whether he saw the supposed four additional Uranian satellites with his 40-foot reflector.
Replies to RP's objections to his theory of the solar corona. Informs RP that William Herschel's larger telescopes were used as front focus. Suggests explanation of his father's disconfirmed discovery of four additional Uranian moons.
Discusses JH's response to his comments on JH's theory of the solar corona. Discusses great difficulty of writing his planned book on sidereal astronomy.
Reports on recent solar eclipse photographs of the solar corona which jeopardize JH's meteoric theory of the corona's origin. Concludes the corona must be 'after all a phenomenon of eruption!!'