image MS_92_344
Image number: RS.17511
Credit: ©The Royal Society

Diagram of the circle of the globe

Date

1690-91

Creator

Unknown, Artist

Object type

Archive reference number

Manuscript page number

p344

Material

Dimensions

height (page): 363mm
width (page): 237mm

Subject

Description

This diagram depicts Robert Hooke's measurements and calculations regarding the circle of the globe. This image appears in 'Memoires of Naturall Remarques in the county of Wiltshire, to which are annexed observables of the same kind in the county of Surrey and Flynt-shire' by John Aubrey, FRS. This manuscript is a transcript of Aubrey's original made by B. G. Cramer, Clerk to the Royal Society, in 1690-91.

Transcription

bce, the Cirkle of the Globe of the Earth ab, the semidiameter of the Earth.
acd, the secant of the Angle at a cd, the height of the Falcon above the Earth bd, the Tangent, which is the visual line from [smudge] to b.. and the like from d to e

But Refraction does carry the Prospect farther. See Mr Hookes Micrographie de hoe.

The Eye at 1 foot above the Levell of the water will by a straight Ray touch the Surface at 6472 foot distant at 4 foot high at twice that distance: at 9 foot high at thrice that distance, very near. - Mr. Robert Hook RS Socius.
Transcribed by the Making Visible project

Object history

By John Aubrey, FRS. This manuscript is a transcript of Aubrey's original manuscript (1685). It was transcribed by B. G. Cramer, Clerk to the Royal Society, at the behest of the Society in 1690-91.
At page 67 is inserted a map of a navigable passage from Bristol to London, engraved by Thomas Jenner in 1668, with the arms of the borough. Six leaves of additional matter are inserted at page 276, and four more at page 304.

Related Fellows

John Aubrey (1626-1697, British), Antiquary
Robert Hooke (1635-1703, British), Natural philosopher

Associated place

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