Search: Herschel, John in author 
1860-1869::1864 in date 
letter in document-type 
Sorted by:

Showing 81–100 of 126 items

Herschel6663

From:
Sir John Herschel
To:
Henry W. Cookson
Date:
[30 April 1864]
Source of text:
RS:HS 5.366 & 24.41
Summary:

Declining the offer of a honorary degree by the University of Cambridge on the grounds of ill health.

Contributor:
John Herschel Project

Herschel6855

From:
Sir John Herschel
To:
Warren de La Rue
Date:
[4 December 1864]
Source of text:
RS:HS 6.163 & 24.73
Summary:

Thanks for the diary and pocket book. Sees that A. V. Guillemin has published an illustrated Astronomy [Le ciel (Paris, 1864)]. Thinks there is scope for publishing a volume of engravings of astronomical objects. Gives his own idea for the construction of a photometer.

Contributor:
John Herschel Project

Herschel7161

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[21 April 1864]
Source of text:
RS:HS 24.40
Summary:

Comments on metrification.

Contributor:
John Herschel Project

Herschel7163

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[3 May 1864]
Source of text:
RS:HS 24.43
Summary:

Comments on some mathematical problems; asks if AD knows about a German geometer by the name of [Bernhard] Riemann; suggests some new names for trigonometry.

Contributor:
John Herschel Project

Herschel7164

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[4 May 1864]
Source of text:
RS:HS 24.44
Summary:

Comments on health of family, and on parliament considering a bill to change weights and measures.

Contributor:
John Herschel Project

Herschel7165

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[14 July 1864]
Source of text:
RS:HS 24.52
Summary:

Comments on the state of JH's health; about ciphers and about decimalization.

Contributor:
John Herschel Project

Herschel7167

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[18 July 1864]
Source of text:
RS:HS 24.53
Summary:

Comments on remedies suggested by AD [see AD's 1864-7-15]; on ciphers.

Contributor:
John Herschel Project

Herschel7170

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[19 August 1864]
Source of text:
RS:HS 24.57
Summary:

Comments on minting of coins [see AD's 1864-8-18], the state of JH's health, and the need for an elocution teacher for one of JH's sons.

Contributor:
John Herschel Project

Herschel7173

From:
Sir John Herschel
To:
Augustus De Morgan
Date:
[15 September 1864]
Source of text:
RS:HS 24.60
Summary:

On algebraic signs, riddles, and the state of JH's health.

Contributor:
John Herschel Project

Herschel7742

From:
Sir John Herschel
To:
Richard Christopher Carrington
Date:
[18 August 1864]
Source of text:
RAS:JH Archive 13/2.4; Reel 10
Summary:

If RC's formulas for sunspots are correct, then 'trade-wind theory' is challenged and sun's photosphere may behave as envelope circulating around sun according to laws of planetary motion. Questions formula relating to sunspot velocity.

Contributor:
John Herschel Project

Herschel7782

From:
Sir John Herschel
To:
the R.A.S.
Date:
[29 June 1864]
Source of text:
RAS: MSS Add.29 [suppl.]
Summary:

Learned that R.A.S. plans to use aplanatic lenses for solar studies. Submits set of unpublished tables by W. L. Newman [see Newman's 1845-2-18] for calculating radii of such lenses. Refers to work of this kind by Josef Fraunhofer, [G. P.] Bond, K. A. Steinheil, and C. F. Gauss.

Contributor:
John Herschel Project

Herschel7785

From:
Sir John Herschel
To:
William Walker
Date:
[18 April 1864]
Source of text:
Bedgebury
Summary:

Agrees to sit for photographic portrait by WW. Thanks for reserving copy of WW's successful [Distinguished Men of Science Living 1807-8] for JH.

Contributor:
John Herschel Project

Herschel7808

From:
Sir John Herschel
To:
James Thomas Walker
Date:
[10 December 1864]
Source of text:
RS:HS 18.16 (C: 24.77)
Summary:

Received Indian survey chart. JH's son John wrote of higher-order ellipsoidal triangles with sides based on geodesical triangles. JH objects that these violate principle of diagonal bracing. Proposes different triangles and names sites in India as apexes. Received G. B. Airy's paper on reduction.

Contributor:
John Herschel Project

Herschel807

From:
Sir John Herschel
To:
Richarda Airy
Date:
[12 April 1864]
Source of text:
JHS 2.11
Summary:

Sends congratulations on the Airy's daughter Hilda's engagement to Edward J. Routh; also thanks for the congratulations sent to JH's son William James on his engagement to Emma Hardcastle.

Contributor:
John Herschel Project

Herschel8351

From:
Sir John Herschel
To:
Richard Hodgson
Date:
[18 February 1864]
Source of text:
RS:HS 19.153 (C: RS:HS 24.31)
Summary:

Charles Pritchard was wrong in ascribing priority for diagonal reflecting telescope in Pritchard's address to R.A.S. As early as 1825, JH was first to use diagonal reflector. Describes its construction.

Contributor:
John Herschel Project

Herschel8352

From:
Sir John Herschel
To:
Richard Hodgson
Date:
[27 February 1864]
Source of text:
RS:HS 19.154 (C: RS:HS 24.32)
Summary:

Did not insinuate that RH plagiarized JH's idea of 'diagonal reflector,' but feels justified in defending JH's claim to being first to apply it.

Contributor:
John Herschel Project

Herschel8353

From:
Sir John Herschel
To:
H. R. H.[?]
Date:
[1864?]
Source of text:
RS:HS 19.155
Summary:

Asks that consideration be given to 'wishes of the Cadet' in selecting a regiment for him.

Contributor:
John Herschel Project

Herschel8513

From:
Sir John Herschel
To:
Herbert Spencer
Date:
[9 March 1864]
Source of text:
RS:HS 16.494 (C: 24.35)
Summary:

In response to HS's query [1864-3-1] about the influence of Auguste Comte on English scientists, JH refers HS to JH's 1845 B.A.A.S. presidential address. States that calculating the motion of a projectile through a resisting medium is extremely difficult.

Contributor:
John Herschel Project

Herschel8626

From:
Sir John Herschel
To:
Roderick Impey Murchison
Date:
[19 November 1864]
Source of text:
Geological Society
Summary:

Asks RM whether RM thinks any of the geographical work of Karl Ritter should be translated into English.

Contributor:
John Herschel Project

Herschel8656

From:
Sir John Herschel
To:
[John Benjamin Smith]
Date:
[5 September 1864]
Source of text:
Manchester Central Library
Summary:

Thanks JS for JS's speech. Discusses in detail JS's views on the introduction of a gold currency into India. Believes that this is a necessity and explains why. Notes problems and advantages involved in the circulation of money based on two standards, silver and gold.

Contributor:
John Herschel Project
Author
Addressee
Correspondent
Date
Document type
Contributor
Transcription available