Gives a reply to the query on life assurance, but is not clear what the question is really about. Is flattered by the suggestion for a passage to the Cape in a Naval vessel, but has made up his mind to travel privately.
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Gives a reply to the query on life assurance, but is not clear what the question is really about. Is flattered by the suggestion for a passage to the Cape in a Naval vessel, but has made up his mind to travel privately.
Responds to JB's 1832-8-25 with comments about the optical properties of tourmaline. JH also talks about his astronomical work, including the collimator on his telescope and his double star work.
Compares in detail observations of several double stars made by several astronomers, and comments on differences; JH also describes a sighting of Biela's comet.
Sends positions of Biela's Comet. Has much success with repolished telescope mirrors and collimator. Designs equatorial revolving roof for Cape observations; sends sketches. Compares WS's, W. R. Dawes's, and JH's observations of Gamma Virginis.
Gives data necessary for astronomers to observe Biela's Comet.
Discusses the history, nature, and appearance of Biela's Comet.