Mentions to CH that 2000 of the nebulae and all of the engravings are printed.
Showing 21–37 of 37 items
Mentions to CH that 2000 of the nebulae and all of the engravings are printed.
Sailing to Cape Town, JH reports sighting an English ship.
Reviews his voyage to Africa in case CH did not receive JH's 1834-1-21 letter. Repairing the house that they bought outside of Cape Town, called 'Feldhausen' by the Dutch and 'The Grove' by the English; they are staying at another home close by. Happy that Table Mountain near the house shelters Feldhausen from southeast gales.
JH describes his sweeps of Scorpio. Writes that the Milky Way is 'extremely curious and interesting.' Has collected a large catalog of southern nebulae, many never before detected. JH's search for Halley's Comet has been unsuccessful thus far.
Applauds CH elected an [honorary] member of the R.A.S. Missed seeing Halley's Comet and Johann Encke's comet; Thomas Maclear, however, viewed Encke's three times. Has studied nearly the entire Southern sky.
Is too busy to use Carl Gauss's magnetometer. Viewing Halley's Comet has interrupted JH's sweeps. Reports that Gamma Virginis is a single star in both the 20-ft. reflector and 7-ft. equatorial.
Reports the birth of his fifth child, Alexander Stewart. Has made some excellent observations of Halley's Comet. Asks CH to inform Carl Gauss that JH has not received Gauss's magnetometer nor is JH certain of how to use it.
Work nearly finished here. Has documented the sixth satellite of Saturn and has seen possibly a seventh.
Confident that 1837 will be his last year in Africa. JH's catalog of nebulae and double stars is nearly complete. Has a series of observations of Halley's Comet from 1836-1-25 to 1836-5-5. Although JH is too busy to undertake any magnetic studies, he has been providing information about Carl Gauss's magnetometer to the new observatory in Bombay. Recalls that Charles Babbage mentioned the 'principle' of Gauss's method 'at least 10 or 12 years' ago.
Reports that he viewed Halley's Comet from 1836-1-25 to 1836-5-10. Now studying sunspots and solar radiation. Comments that the sun has more spots than JH previously thought. Has been busy during the December solstice determining the constant of solar radiation.
Reports a joyous reunion with family and friends.
Impressed with the new President of the R.S.L., Spencer J. A. Compton. Has learned that Carl Gauss was awarded the Copley Medal for his research in terrestrial magnetism.
Has enclosed with the letter 'a letter sketch of the 40 feet [telescope] (as it now stands) made without hands, by Photography.'
The 20-ft. reflecting telescope used at Cape Town was delivered safely to Slough.
Reports the birth of JH's seventh child, Maria Sophia. Met Adolphus Frederick, the Duke of Cambridge, who asked about CH.
Eliminated plans to visit Rio de Janeiro on the Herschels' return home, which will enable them to visit Hanover. Notes that JH's rheumatism attacks have interfered with his observations. JH considers his sweeping work finished. Has sent to the R.S.L. the first six hours of JH's 'Southern Catalogue of Nebulae and Double Stars' along with the micrometric measures of 400 southern double stars made with the equatorial.
Herschels safely landed from Africa and in fine spirits.