Additional approaches to resolving TM's mural circle problem [see JH's 1835-2-5].
Showing 21–40 of 162 items
The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Additional approaches to resolving TM's mural circle problem [see JH's 1835-2-5].
More on the mural circle [see JH's 1835-2-7].
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.'
Reports on location of a planetary nebula. Expresses thanks for book by [Robert] Woodhouse.
Some comments about constant error in TM's observations.
About the difficulty of measuring high and low tide with the instruments available to TM; offers the design of an instrument that would measure the mid-point between high and low tides.
Excited about JH's observations, and has shown them to several people.
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.
Made a 'mess' of the tidal observation and meteorological observations that he took earlier in the week.
Attempting to correct the faulty tidal and meteorological observations that JH made earlier in the week.
Has interpolated the hourly tidal observations for Simon's Bay.
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.
Sends TM some tide observations, and some calculations done on them.
Describes his comparison of the tidal series at Simon's Bay and Table Bay. Sending his barometer to TM.
Reports having read the record JH sent of [tidal] observations and comments on it.
Believes that TM is the first to see the return of Halley's Comet [see TM's 1835-9-1].
Sends information about where to look for Encke's comet.
Has not had any success in finding comets.
JH is chagrined to note that he forgot to observe the equinox, after having impressed on any and all the need to do so.