Proposes to travel to visit FH next day to observe the sun with him.
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Proposes to travel to visit FH next day to observe the sun with him.
Thank you for his letter. There are no misprints or conflicting statements in his Familiar Lectures. Explains the various points.
Does not think Mr. Thornton's pamphlets solve the problem of squaring the circle as the circle is 3/4 of the circumscribed square. Comments further on these theories.
Describes problem with spectral lines in telescope while trying to understand William Huggins's results.
Comments on impossibility of increasing the intrinsic illumination of a source with a telescope; how to obtain the spectrum of red flames of the sun.
Believes that expensive telescope wanted by William Huggins is unnecessary for the intended purposes [see GS's 1867-5-3]; JH offers a telescope of his own to R.S.L.
Agrees reluctantly to write obituary notice of William Whewell; wishes he had been asked earlier.
Comments on the time needed by JH's son [John] to perform observations requested by R.S.L.; thanks for list of tutors [see GS's 1867-5-13].
Note accompanying JH's obituary notice of William Whewell.
Is assisting in communication between G. G. Stokes and GA, about stereoscopic observation of eclipses; JH is not mobile enough to attend the next Board of Visitors meeting.
A note with G. G. Stokes' letter, which JH forgot to enclose [see JH's 1867-5-5].
Thanks RW for sending him a photograph of RW; sends photograph of JH in return.
Family news; JH is very proud of the accomplishments of young daughter Constance Anne.
News of many of the children, as well as news from London.
The R.S.L. proposes sending telescopic and spectroscopic equipment to India to observe the solar eclipse of 1868. They want to know if son John would be prepared to make the observations. John could use some of his leave time in England to prepare.