Discusses their table of comet stars.
Showing 61–75 of 75 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.
Discusses their table of comet stars.
Wants to reset his barometer by TM's.
Compares JH's and TM's barometric readings. Criticizes Pierre Morin's work.
JH is frustrated with his inaccurate barometric readings.
Setting a unit of measurement for solar radiation (the 'actine'); proposes to 'take for a unit of solar heat that which if all employed in heating a cubic inch of water exposing a horizontal surface of one square inch, to a vertical Sun during one minute would produce a dilation of one thousandth part of its volume.'
Testing whether an actinometer with a glass back is more accurate than one without.
Thanks TM for restoring JH's micrometer.
Believes that JH and TM can compile a better comet catalog together than they could separately.
Found comet in Scorpio this morning. Gives map and description. Something wrong with reflector. 'Paarl expenses.' Describes puff adder captured by Dr. Guerd. Glad that Stone is doing well.
Problems observing Halley's Comet. Sends first batch of TM's reduction of Thomas Brisbane's stars. Does JH approve J. C. Adamson's and J. R. Innes's offer to help calculate and tabulate Expedition data? Francis Baily's proposal to rename constellations. Renegotiating price for repairs on equatorial. Describes dream resulting from reading Baily's life of John Flamsteed.
Observation of Halley's Comet. Sends servant to pick up information on star 'Constants.'
Letters from W. H. Smyth. Notes on Halley's Comet and possible planet sighting.
Observations of 'Comet stars.' Sends original 'Transit book.' Take care of it.
Sends annotations to JH's 'sweeping sheet.' Complains of errors in ring micrometer.
Sorry for surprise in church yesterday. Last minute request for JH and wife [to be godparents] was unplanned. Notes on 'Parallax & refraction.' Will soon observe all stars in [F. W.] 'Bessel's zone.'