Comments on GA's explanations about polarized light, and discusses GA's idea of the nature of light [see GA's 1865-10-18].
Showing 61–80 of 96 items
Comments on GA's explanations about polarized light, and discusses GA's idea of the nature of light [see GA's 1865-10-18].
Saddened by the poor treatment of W. H. Smyth [see GA's 1865-10-18].
Passes along a report that someone took a 4-foot telescope to the top of Snowdon [mountain], from where he could see the eight satellites of Saturn and the rings of Neptune.
Realizes that GA is quite correct [see GA's 1865-10-30]; JH had neglected a basic principle about interference.
Acknowledges receipt of Royal Observatory's astronomical, meteorological, and magnetic observations for 1863.
Has noted that Josef Stefan of the Vienna Academy of Sciences holds views on light and its polarization similar to GA's [see GA's 1865-10-30]. Agrees with GA's correction of an essay on Julius Caesar's landing in Britain.
Approves of GA's development of a new type of eyepiece for use with the Royal Observatory's transit circle telescope.
About William Whewell's accident, and the ideas of E. F. W. Klinkerfüss on the behavior of light due to the motion of a star source.
Comments on the quality of the star catalogue of Charles Rümker [see John Wrottesley's 1866-4-16].
Comments on William Whewell's replacement on the Royal Observatory's Board of Visitors.
Inquires of GA as to the current status of parliamentary moves to introduce the metric system into Britain [see GA's 1864-9-28].
Has heard that the Indian government may adopt the metric system; wants to gather, and send to India, information against metrication; JH still wants to bring the earth's axis length into the measuring system.
Avails himself of GA's offer of assistance to obtain information [see GA's 1866-4-27].
Comments on Charles Rümker's observations and agrees to a meeting [see John Wrottesley's 1866-5-12].
Responds to meeting arrangements [see GA's 1866-5-24].
Not well enough to attend Visitation Day at the Royal Observatory, but would be pleased if GA would invite JH's son John.
A note to accompany forwarding of papers and letters relating to Charles Rümker's observations [see GA's 1866-5-31].
Has been asked to serve on a new Commission on Weights and Measures; indications are that the metric system is being recommended to the Indian government.
JH responds with an assessment of the Indian observatories [see GA's 1866-9-24].
Comments on the work of the Commission on Weights and Measures as outlined by GA [see GA's 1866-9-13].