Has interpolated the hourly tidal observations for Simon's Bay.
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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.
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.
Will be obliged for the Tide Observations book of Table Bay. Intends to enter into an agreement with the Tide Master.
Sends TM some tide observations, and some calculations done on them.
Sends the Tide observations made in Table Bay. These are now at a standstill due to the expense involved. Tomorrow he intends to engage the Tide Master. Do they wind up with a dinner?
Describes his comparison of the tidal series at Simon's Bay and Table Bay. Sending his barometer to TM.
Only made two copies of the Tide Observations, one for the Observatory and one to be forwarded to the Admiralty. Is engaged instrumentally with the transit instrument. Has engaged a new carpenter for the observatory.
Reports having read the record JH sent of [tidal] observations and comments on it.
Sorry to have forgotten the curves; now encloses them. A. Walter has been here and brought the scrap he now encloses. Walter's tidal observations have been useless so far.
Will long remember the triumphant meeting last night. Has heard nothing from England. Hopes C. P. Smyth may have come in the Romney, which arrived in Simon's Bay last evening. The traversing floor for the reflector will be finished tomorrow. Has been told that JH foretells that Halley's Comet will not be visible.
Believes that TM is the first to see the return of Halley's Comet [see TM's 1835-9-1].
Has been observing since 3 a.m. and his fingers are powerless with the cold. Observed a star group, which may be Halley's Comet. Comments on the working of his telescope. Has JH placed his 20-ft. telescope in position for the Blueberg Mountains?
Sorry to hear he had such wretched weather for their jaunt. The violent winds overturned his 14-ft. reflector and split the tube. Has obtained a capital tent for the Cape. No news from England. Commences the solar observations tomorrow, if fine.
Received a newspaper from England, which gave news of a comet. A ship entered Table Bay in the night; she may be from England.
Sends information about where to look for Encke's comet.
Is grateful for J. F. Encke's letter. JH's suggestion of the 14-ft. reflector was anticipated for Halley's Comet. Wishes that JH's aunt could visit the Cape.
Sending a copy of the memorandum he made of the first mirage he has ever seen. Describes various points. Much obliged for J. F. Encke's Ephemeris; his writing reminds TM of Isaac Newton.
Has not had any success in finding comets.
On the evening on which JH was at the Observatory, he believes he observed Encke's Comet; gives details. Searched this morning for Halley's Comet, without success. Rejoices to hear that G. B. Airy has been secured for the public service. No news from England.
JH is chagrined to note that he forgot to observe the equinox, after having impressed on any and all the need to do so.