Reports on location of a planetary nebula. Expresses thanks for book by [Robert] Woodhouse.
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Reports on location of a planetary nebula. Expresses thanks for book by [Robert] Woodhouse.
Has interpolated the hourly tidal observations for Simon's Bay.
Reports having read the record JH sent of [tidal] observations and comments on it.
Suggests a means of resolving TM's problem with the mural circle.
Found Encke's Comet the night before last. Has not had a chance to see Halley's Comet. Will JH come to the Observatory? There are no fleas.
Is glad JH has given his opinion to Francis Beaufort on the subject of observations of the first class. Encke's comet is invisible in the 14-ft. within the range of 10 degrees. Last two nights were very favorable. Has seen Encke's comet three times, and it appears just as he saw it in England.
Describing JH's observations and comparing notes.
Responds to TM's query in his 1835-1-17 about the effect that motion of the center of the mural circle would have on the microscopic readings.
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].
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.
Sends TM some tide observations, and some calculations done on them.
Believes that TM is the first to see the return of Halley's Comet [see TM's 1835-9-1].
Still struggling with the problems inherent in using the mural circle; the comet has apparently been seen by JH's mechanic, John Stone, prior to having been sighted by TM.
Sends information about where to look for Encke's comet.
Has not had any success in finding comets.
Is intrigued by the apparent displacement of several planetary nebulae from the positions found in the catalogues of other observers. Does not know what to think.
JH is chagrined to note that he forgot to observe the equinox, after having impressed on any and all the need to do so.