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The Royal Society: Science in the Making

Paper, 'Note of a theory of orthoptic and isoptic loci' by Charles [M] Taylor

Reference number: PP/5/16

Date: 1884

Description

Taylor writes: 'The orthoptic locus of a curve and its isoptic loci are the loci of the points of concourse of pairs of tangents drawn to it at right angles, and at angles equal to given angles, respectively. As a step towards a general theory of such loci, of which special cases only have been treated hitherto, it is shown below that the order of the orthoptic locus of a curve of class n is n(n—1), and the order of its isoptic loci 2n(n—1).'

Annotations in pencil and ink.

Subject: Mathematics

Received 10 June 1884. Read 19 June 1884. Communicated by [Jame Whitbread Lee] Glaisher.

A version of this paper was published in volume 37 of the Proceedings of the Royal Society as 'Note of a theory of orthoptic and isoptic Loci'.

Reference number
PP/5/16
Earliest possible date
1884
Physical description
Ink and graphite pencil on paper
Page extent
7 pages
Format
Manuscript

Creator name

Charles M Taylor

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Citation

Charles M Taylor, Paper, 'Note of a theory of orthoptic and isoptic loci' by Charles [M] Taylor, 1884, PP/5/16, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/pp_5_16/paper-note-of-a-theory-of-orthoptic-and-isoptic-loci-by-charles-m-taylor, accessed on 16 November 2025

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    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

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