Discusses [Angelo] Secchi's letter. Can supply the Jesuits in Cuba with magnetic apparatus they need. Discusses Secchi's views on cause of earthquakes and volcanic eruptions.
Showing 61–80 of 166 items
Discusses [Angelo] Secchi's letter. Can supply the Jesuits in Cuba with magnetic apparatus they need. Discusses Secchi's views on cause of earthquakes and volcanic eruptions.
Must postpone meeting at Kew Observatory because of a severe cold. Asks JH to choose a later date.
Explains and encloses abstract of paper on action of magnetic oxides under various conditions. Discusses their purifying influence on water.
Announces appointment of James D. Forbes to the Principalship of the United College at St. Andrews.
Discusses installation of a 4-ft. aperture equatorial telescope. Describes plans for a glass polishing machine in great detail.
Searches for asteroids. Measures double stars and variables; Alexander Herschel assists. Asks JH's opinion of parallax measuring methods. R.S.L. funds offered to M. J. Johnson's family in his memory.
Will send a package for JH through a third party.
Discusses his efforts making reflecting telescopes.
Informs JH which observatories received the object lenses from his workshops.
Informs JH that he is taking over the optical workshop of his late father-in-law, Andrew Ross.
Discusses his telescopes and their dimensions. Wants to obtain an object glass of an 8-in. aperture.
Concerning the publication of JH's Telescope.
Will allow more pages for the text of JH's Telescope.
Receives additions to JH's Telescope.
Sends newspaper article about the meteor fall in Oswego County. Compares the account to a meteorite that fell in the Santiago Plains of Chile. Discusses authenticity of suspected meteorite specimens.
Questions concerning the manuscript of JH's Telescope. Will send proofs to London.
Sends dimensions of an object glass.
Returns a letter from JH.
Asks JH to sign a document relating to Col. Gelland [?].
Provides information on a telescope being built by [Thomas] Cooke for HF's brother, [Isaac] Fletcher.