Search: Herschel, John in correspondent 
Ritchie, William in correspondent 
1820-1829::1825 in date 
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Herschel2098

From:
Sir John Herschel
To:
William Ritchie
Date:
[27 January 1825]
Source of text:
RS:HS 14.347 (C: RS:HS 20.197)
Summary:

Presented WR's paper on a new photometer to R.S.L. Discusses how objections may be avoided. Believes [John] Leslie's photometer should be thrown aside.

Contributor:
John Herschel Project

Herschel2099

From:
William Ritchie
To:
Sir John Herschel
Date:
[30 January 1825]
Source of text:
RS:HS 14.348
Summary:

Still anxious to become a fellow of the R.S.L. Thanks JH for offer. Would like to be elected before end of present session.

Contributor:
John Herschel Project

Herschel14287

From:
William Ritchie
To:
Sir John Herschel
Date:
[3 February 1825]
Source of text:
TxU:H/M-0449; Reel 1093
Summary:

Thanks JH for introducing WR's paper on photometer to R.S.L. council. Sends drawing of instrument and alterations to WR's paper that resulted from improvements in instrument.

Contributor:
John Herschel Project

Herschel14794

From:
William Ritchie
To:
Sir John Herschel
Date:
[5 February 1825]
Source of text:
TxU:H/M-1212; Reel 1060
Summary:

Suggested improvements to John Leslie's photometer.

Contributor:
John Herschel Project

Herschel2100

From:
Sir John Herschel
To:
William Ritchie
Date:
[19 February 1825]
Source of text:
RS:HS 20.200
Summary:

Will present alterations of WR's paper to R.S.L. [see JH's 1825-1-27]. Asks if he may describe the similarities between WR's photometer and an instrument JH used in Italy and Sicily.

Contributor:
John Herschel Project

Herschel2101

From:
William Ritchie
To:
Sir John Herschel
Date:
[3 March 1825]
Source of text:
RS:HS 14.349
Summary:

Pleased JH liked his paper on differential photometer. Discusses apparatus for experiments on light. Describes some papers he has written and some he is writing.

Contributor:
John Herschel Project

Herschel14288

From:
William Ritchie
To:
Sir John Herschel
Date:
[25 May 1825]
Source of text:
TxU:H/M-0450; Reel 1093
Summary:

Not upset that JH withdrew WR's paper on photometer from R.S.L. Sent similar paper to David Brewster's [Edinburgh Journal of Science] with note on JH's method for finding relative heating power of solar rays. Wants to dedicate WR's book on light and heat to JH.

Contributor:
John Herschel Project
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