Forgot to call his attention to the column regarding the Julian period in the Nautical Almanac. Something strange about the neighborhood of R. Leporis. He has no doubt seen the table of Julian dates in the Connaissance des temps.

Sends calculation of the Transits of Venus in 2004 and 2012. Cannot find any record of new double stars. Is in doubt about R. Leporis. Quotes an historical incident regarding an eclipse of the sun and the removal of Mahomet's pulpit. Did F. X. von Zach make his calculations himself?

Is anxious to have an astronomical eye-piece based on JH's principles. Encloses communication from Messrs. Horne and Thornthwaite, who would like details for their employee, [W.?] Ackland, to work from.

Is grateful for his reply. Hopes he is feeling better. Escaped worst of the winter by expedition to Algeria, though the results were disappointing. Comments on some of his observations. Feels sure [W.?] Ackland will be able to construct a suitable eyepiece.

Queries regarding the red glow seen during an eclipse of the sun.

Would like his views on the correct definition of a billion, to settle an argument.

Thanks for his Easter offering. Sends a little book which he may find useful.

Sending a long letter proving one of JH's theories regarding the sun and confirmation of one of William Herschel's observations concerning Saturn.

Thanks for JH's remarks on his own 'What is matter'; comments on these. Also regarding JH's theory of the sun's repulsive force and William Herschel's observations on the strange shape of Saturn.

His colleague, [G. R.] Waterhouse, has passed an inquiry from JH to NM regarding a mineralogical character. It is a specimen of Obsidian, very high in iron content.

Is gratified and encouraged by JH's approval of JN's illustrations of the lunar surface. The improvement in printing processes makes it possible to use such photographic illustrations.

Many thanks for his comprehensive explanations for the use of that word. Regrets JH's tenant at Slough is so unpunctual. Has JH any plan or map of his property at Slough and Upton?

Opposes bill on decimalization of [British] weights and measures.

JH's 25 Apr. 1871 reply encouraged JB to oppose introduction of French metric system. [Thomas] Brassey and Mr. Shuttleworth will vote against it [in House of Commons].

[J. B.] Smith plans second reading [of metric bill] on 18 [Apr.] before Parliament adjourns. AH will approve it again. Philip Harwood, editor of Saturday Review, asks for article by JH on [metric system] before House votes on it.

Philip Harwood, editor of Saturday Review, wants to use JH's letter as part of article on metric system on 13 May [1871] in anticipation of 16 May debate in House [of Commons]. Second reading of bill was postponed until 6 June.

Second reading of metric bill in Parliament was postponed to 8 June. PH will delay publication of JH's article in Saturday Review to coincide with public interest in bill.

Will send B.A.A.S. grant for £40 directly to G. A. Erman for reduction of Gaussian constant unless WS hears differently from JH.

Acknowledges receipt of 'present' from [H. J. R.] Petersen.

Requests testimonial from JH to assist FW in obtaining better appointment on Society's library staff.