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Herschel, John in correspondent 
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From:
Joseph Jopling
To:
Sir John Herschel
Date:
[13 July 1844]
Source of text:
RS:HS 10.415
Summary:

Hoping to publish a register of examples of curves based on his own Septenary system of generating lines. Would JH be interested?

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[1 February 1854]
Source of text:
RS:HS 10.416
Summary:

Sending diagrams of Halley's Comet traced from a work, The Orbs of Heaven.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[23 March 1860]
Source of text:
RS:HS 10.417
Summary:

Outlining his geometrical laws for the Great Pyramid.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[5 May 1860]
Source of text:
RS:HS 10.418
Summary:

Pleased to hear that he has received his statements representing curves; comments on these. Further regarding his views on the Great Pyramid.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[13 June 1860]
Source of text:
RS:HS 10.419
Summary:

Saw J. S. Perring for only a short time. Explained his own theories and models of the Great Pyramid at the Royal Institution. Enlarges on his theories. Has been invited to lecture to the Sino-Egyptian Society.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[11 September 1860]
Source of text:
RS:HS 10.420
Summary:

Unable to give in a letter the practical geometrical results he has worked out from the laws of the king's chamber of the Great Pyramid. It would grace a history of Egyptian astronomy.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[18 September 1860]
Source of text:
RS:HS 10.421
Summary:

Thanks for his letter. Any astronomical observations can be recorded on a plane or spherical surface. 108 equal cubes will exactly fill the coffer in the king's chamber of the Great Pyramid.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[1 October 1860]
Source of text:
RS:HS 10.422
Summary:

Outlining a method for making star maps with a pyramid.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[25 October 1860]
Source of text:
RS:HS 10.423
Summary:

Encloses [a diagram] of the transverse section of the entrance of the Great Pyramid, with details of the travelling platform for making observations.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[23 December 1860]
Source of text:
RS:HS 10.424
Summary:

Has received colored tracing from Italy of drawings by Col. Beek. Compares them with what may be done using the Great Pyramid.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[24 January 1861]
Source of text:
RS:HS 10.425
Summary:

Encloses another design for permanent lines on the faces of a pyramid to observe and record astronomical facts; comments on his methods.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[13 February 1861]
Source of text:
RS:HS 10.426
Summary:

Is obliged for his note and statement on the necessity of pegs at the ends of the lines of the Great Pyramid; comments on this. Has seen Augustus De Morgan and explained his theories. Urges the need for a permanent practical geometrical gallery.

Contributor:
John Herschel Project
From:
Joseph Jopling
To:
Sir John Herschel
Date:
[5 March 1863]
Source of text:
RS:HS 10.427
Summary:

Several of the illustrations in JH's Outlines Astr. have a familiar look. Doubtless all based on eternal laws. Comments on his own theories.

Contributor:
John Herschel Project