Search: Herschel, John in addressee 
1820-1829::1826::01 in date 
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Herschel2737

From:
Edward Sabine
To:
Sir John Herschel
Date:
[1826]
Source of text:
RS:HS 15.17
Summary:

Thanks JH and Charles Babbage for their paper on the magnetic experiments. Asks to have 20 extra copies of the paper on the rocket experiments made when it is printed. Speaks of travel expenses. Mentions [T. F.] Colby's opinions regarding the Spitzbergen measurements.

Contributor:
John Herschel Project

Herschel8088

From:
Thomas Young
To:
Sir John Herschel
Date:
[1826 to 1829]
Source of text:
RS:HS 18.354
Summary:

Errors in equinoctial time calculated by John Pond. Suggests limiting decimal places in value of equinoctial time to reflect this uncertainty. Making error uniform will make it awkward to alter future almanacs.

Contributor:
John Herschel Project

Herschel8090

From:
Thomas Young
To:
Sir John Herschel
Date:
[1826 to 1829]
Source of text:
RS:HS 18.356
Summary:

Resolved puzzle about sidereal year, which needs better definition. Error between true and nominal positions prevents TY adopting 'equinoctial time' for chronology investigations.

Contributor:
John Herschel Project

Herschel1375

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[1826-1]
Source of text:
RS:HS 17.324
Summary:

Comments on several experiments with spectra passing through glass films.

Contributor:
John Herschel Project

Herschel1307

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[4 January 1826]
Source of text:
RS:HS 17.257
Summary:

Asks JH about Dr. Balfour's account in Asiatic Researches about lunar effects on humans in India.

Contributor:
John Herschel Project

Herschel1211

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
[12 January 1826]
Source of text:
RS:HS 17.258
Summary:

Comments on use of muriate of lime on plants. Also on existence of unexplained bands on film and on presence of red light beyond normal spectrum with light originating from certain sources.

Contributor:
John Herschel Project

Herschel12550

From:
Giovanni Antonio Plana
To:
Sir John Herschel
Date:
[18 January 1826]
Source of text:
RS:HS 13.420
Summary:

Responds to receipt of sample impression of GP's memoir [see GP's 1825-12-3]. Comments on printing and paying arrangements, and to whom copies are to be sent. Comments on value of using an equatorial telescope as opposed to a meridian circle. [Some parts of the letter are illegible.]

Contributor:
John Herschel Project

Herschel12551

From:
Giovanni Antonio Plana
To:
Sir John Herschel
Date:
[28 January 1826]
Source of text:
RS:HS 13.421
Summary:

Writes to correct error JH identified in GP's memoir [see GP's 1826-1-18]. Also asks to have two additional passages added to improve memoir. Intends to come to England next winter. Is including a list of corrections for the memoir [list is missing].

Contributor:
John Herschel Project

Herschel1374

From:
William Henry Fox Talbot
To:
Sir John Herschel
Date:
28 January [1826?]
Source of text:
RS:HS 17.323
Summary:

Questions and comments regarding improvements in microscopy.

Contributor:
John Herschel Project
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