Actinometer observations during the eclipse.
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Actinometer observations during the eclipse.
Found two planetary nebulae not listed in any catalog; hopes to show them to JH tonight.
Apologizes for his erroneous reduction. Thanks TM for his list of 'Zenith points.'
William Whewell asked JH to compare their June tidal observations with those of the British Admiralty; JH will urge John Deas Thompson to be extra precise in his findings.
Attempting to correct the faulty tidal and meteorological observations that JH made earlier in the week.
Busy interpolating the Simon's Bay tidal series; JH then intends to study Table Bay and to compare the results. Asked William Whewell to back an application to the British Admiralty for a tide clock to be erected at Simon's Bay as a permanent tide station.
Describes his comparison of the tidal series at Simon's Bay and Table Bay. Sending his barometer to TM.
Discusses printing costs. Heard that Halley's Comet was seen with the naked eye in Cape Town; JH is excited about his own prospects of seeing the comet.
Warns that 'a share in a new planet is advertised and that those who will bid must be on the alert.'
Hopes that TM can explain the errors in JH's star reductions. Saw Halley's Comet last night; comments that 'its tail was again fine and head very bright.'
In some places, Halley's Comet will be seen in or near its perihelion during the solar eclipse.
Asks TM to come over and to select the trees for the Time Ball.
Asks TM to inquire of Captain F. W. Grey of the Jupiter about N. L. Lacaille's mural quadrant, which was supposedly aboard the ship two years ago.
Is TM planning to go to Paarl?
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.
Busy taking the means of TM's reduced star observations. Angry that John Stone and James Rance saw Halley's Comet and never told JH.
C. P. Smyth appointment as assistant to Thomas Maclear pleases JH. Suggests method of determining right ascension of double stars with collimating telescope. Sends brochure proposing worldwide meteorological observations.
C. P. Smyth arrived at Cape on 10 October; Thomas Maclear seems pleased with his work. Asks WS to continue observing Gamma Virginis; JH has observed it only as a single star in recent attempts. Thanks WS for distributing meteorological brochures. George Eden visits and will send meteorological observations from India.
Describes the tests and adjustments JH has recommended to Thomas Maclear to try to remove anomalies from the functioning of the transit circle at the Royal Observatory, Cape of Good Hope; also comments on the beauty of some southern nebulae.