Received documents from JH just before leaving for Berlin. Discussed periodic stars in Berlin. Stayed in Berlin longer than expected, but was received well by old friends.
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Received documents from JH just before leaving for Berlin. Discussed periodic stars in Berlin. Stayed in Berlin longer than expected, but was received well by old friends.
Sorrow at loss of his daughter.
Sends by book post two photographs of the original drawings of the sun's observations, also a photograph of a model of the S.E. portion of the moon; comments on them. Will be pleased to accept JH's invitation to visit Collingwood.
Thanks JH upon receiving the essay for the Leeds Astronomical Society lecture series ['The Yard, the Pendulum, and the Metre, Considered in Reference to the Choice of a Standard of Length'].
Thanks GA for receipt of some Royal Observatory publications; is still pushing the British metrical standard based on the length of the earth's polar axis [see JH's 1860-3-2].
Condolences on death of JDH’s daughter.
Is co-editor of a new quarterly scientific journal [Quarterly Journal of Science] and would be pleased to receive any contributions from JH, which would be liberally paid for.
Leeds Astronomical Society will publish the essay written by JH for their lecture series after its presentation. WT will forward the proof for JH's corrections.
Concerning the 'Standards.'
Comments on the ease of calculation in geodesy in JH's version of the English system of units, and asks GA for some clarifications as JH prepares the seventh edition of his Outlines Astr.
JH wants to avoid using the meter in England; asks GA for the results of A. R. Clarke's calculations on the figure of the earth [see GA's 1863-10-7].
Regarding A. R. Clarke's paper on Geodesy. Benjamin Peirce's Lunar Table. The sun's parallax. JH's nebulae catalogue. Regarding the English inch.
Is still not happy with the earth's axis as a source of standard length; sends JH the results of A. R. Clarke's calculations on the figure of the earth [see JH's 1863-10-8].
Points out minor errors in the manuscript of JH's 'The Yard, the Pendulum, and the Metre.'
Comments on CD’s paper on Linum [Collected papers 2: 93–105].
Sends specimens of dimorphic and trimorphic Oxalis.
Comments on H. W. Bates’s work [Naturalist on the river Amazons].
Thanks for sending him his memoir on the Figure of the Earth. Comments on this. His son John would find a copy of this memoir of great assistance in his work in India; would he send him one.
Thanks for his comments on his memoir. Sends a few additions, which he will be submitting to the R.A.S. in due course. Will send a copy of the memoir to JH's son.
Sees that JH mentions 'the longitude of perihelion on the ecliptic' as one of the elements he would like to have in the case of the small planets. Would like his advice.
Informs JH that his photographs of the moon's surface and diagrams of the sun's envelope were sent to the engraver.
Notes reception of corrections to JH's 'The Yard, the Pendulum, and the Metre.' Will send JH 100 copies of the essay.