Skip to content

Please be aware that some material may contain words, descriptions or illustrations which will not reflect current scientific understanding and may be considered in today's context inaccurate, unethical, offensive or distressing.

Diagram, 'Sketch shewing method for finding the distance EF between two spikes in the tops of two piles in Berry's Bay, Port Jackson [Australia]' by Richard Threlfall and John Frederick Adair

Reference number: PP/14/36/2

Date: 1889

Description

A geometrical diagram illustrating Threlfall and Adair's method for measuring a distance.

Subject: Physics / Mathematics

A print of this diagram was published in volume 46 of the Proceedings of the Royal Society alongside the paper 'On the velocity of transmission through sea-water of disturbances of large amplitude caused by explosions'.

Reference number
PP/14/36/2
Earliest possible date
1889
Physical description
Ink on paper
Page extent
1 page
Format
Manuscript

Creator names

Richard Threlfall

View page for Richard Threlfall

John Frederick Adair

Use this record

Citation

Richard Threlfall, John Frederick Adair, Diagram, 'Sketch shewing method for finding the distance EF between two spikes in the tops of two piles in Berry's Bay, Port Jackson [Australia]' by Richard Threlfall and John Frederick Adair, 1889, PP/14/36/2, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/pp_14_36_2/diagram-sketch-shewing-method-for-finding-the-distance-ef-between-two-spikes-in-the-tops-of-two-piles-in-berrys-bay-port-jackson-australia-by-richard-threlfall-and-john-frederick-adair, accessed on 18 April 2026

Link to this record

Embed this record

<iframe src="https://makingscience.royalsociety.org/embed/items/pp_14_36_2/diagram-sketch-shewing-method-for-finding-the-distance-ef-between-two-spikes-in-the-tops-of-two-piles-in-berrys-bay-port-jackson-australia-by-richard-threlfall-and-john-frederick-adair" title="Diagram, 'Sketch shewing method for finding the distance EF between two spikes in the tops of two piles in Berry's Bay, Port Jackson [Australia]' by Richard Threlfall and John Frederick Adair" allow="fullscreen" frameborder="0" width="100%" height="500px"></iframe>

Hierarchy

This item is part of:

Related Fellows

Explore the collection

  • Proceedings Papers

    The archival collection known as 'Proceedings Papers' is comprised of manuscripts and occasional proofs of scientific papers sent to the Royal Society which were read before meetings of Fellows and printed in full in the Proceedings of the Royal Society.

    Dates: 1882 - 1894

    View collection