Search: Herschel, John in correspondent 
Lassell, William in correspondent 
Sorted by:

Showing 120 of 66 items

From:
William Lassell
To:
Sir John Herschel
Date:
[10 March 1842]
Source of text:
RS:HS 11.125
Summary:

Sending a description of the observatory he has erected, containing an equatorially mounted Newtonian reflector. Has high opinion of its efficiency. Has detected a sixth star near the trapezium of Orionis.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[20 March 1842]
Source of text:
RS:HS 22.114
Summary:

Comments on WL's finding a sixth star in the trapezium of Orion [see WL's 1842-3-10]; lists other catalogues that identify that star.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[29 March 1843]
Source of text:
RS:HS 11.126
Summary:

Sending a letter he has received from a friend regarding a curious observation of the moon. Has seen the comet and encloses diagrams of its position.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[26 August 1846]
Source of text:
RS:HS 11.127
Summary:

Has seen the seventh satellite of Saturn. Encloses diagrams and comments on them.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[28 August 1846]
Source of text:
RS:HS 22.280
Summary:

Comments on WL's observation of the seventh satellite of Saturn as noted in WL's 1846-8-26.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[28 August 1846]
Source of text:
RS:HS 11.128
Summary:

Was in error when in his last letter he stated he had seen the seventh satellite of Saturn; he has yet to see it.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[7 September 1846]
Source of text:
RS:HS 11.129
Summary:

Details of WL's observations of the seventh satellite of Saturn.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[13 September 1846]
Source of text:
RS:HS 22.283
Summary:

Believes that the observations WL has made are quite sufficient to establish the existence of the seventh satellite of Saturn.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[1 October 1846]
Source of text:
RS:HS 22.285
Summary:

Announces, to WL, the discovery of a new planet beyond Uranus, gives co-ordinates, and urges WL to look for satellites 'with all possible expedition.'

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[12 October 1846]
Source of text:
RS:HS 11.130
Summary:

Details of WL's observations of a ring and satellite of U. J. J. Leverrier's planet.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[1 February 1847]
Source of text:
RS:HS 22.298
Summary:

Ask WL's permission to make reference to WL's sighting of the seventh satellite of Saturn in JH's observations of all the satellites of Saturn.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[4 February 1847]
Source of text:
RS:HS 11.131
Summary:

About observations of the seventh satellite of Saturn, and using William Parsons' (3rd Earl of Rosse) 'machine'.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[6 August 1847]
Source of text:
RS:HS 11.132
Summary:

Note to accompany details of WL's observations of the satellite of Neptune. [Details are found in WL's letter to H. C. Schumacher of 1847-8-6.]

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[14 August 1847]
Source of text:
RS:HS 11.134
Summary:

Grateful for JH's Cape observations. Has nothing new to report on the ring of Neptune. Has been troubled with dew on his prism, but has now succeeded in overcoming this difficulty.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[19 January 1848]
Source of text:
RS:HS 23.4
Summary:

Urges WL to make public his observations of the seventh satellite of Saturn as Otto Struve is about to announce his observation of the same body.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[22 January 1848]
Source of text:
RS:HS 11.135
Summary:

Has sent his observations on Saturn and Neptune to the R.A.S. and encloses a copy for JH. Weather has been unsuitable for many observations recently. Has not heard of any observations of a second satellite of Neptune.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[31 January 1848]
Source of text:
RS:HS 11.136
Summary:

Has received a letter from W. C. Bond of the Cambridge Observatory (U.S.A.), who speaks of the satellite of Neptune. Bond also sends details of the stars around Orion. Relates his own work on the specula of telescopes. Intends to submit a paper on this to the R.A.S.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[22 September 1848]
Source of text:
RS:HS 23.37
Summary:

Is pleased to hear of the discovery of further satellites of Neptune.

Contributor:
John Herschel Project
From:
Sir John Herschel
To:
William Lassell
Date:
[11 October 1848]
Source of text:
RS:HS 23.39
Summary:

Some question of Harvard University observer having observed the satellite [see JH's 1848-9-22] one day before WL.

Contributor:
John Herschel Project
From:
William Lassell
To:
Sir John Herschel
Date:
[13 October 1848]
Source of text:
RS:HS 11.137
Summary:

Outlining the apparent controversy between himself and W. C. Bond over the discovery of the satellites.

Contributor:
John Herschel Project