Discusses their table of comet stars.
Showing 61–75 of 75 items
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.'