Unpublished paper, 'A biometrical study of conjugation in Paramaecium [Paramecium]' by Raymond Pearl
Reference number: AP/77/2
Date: 1905

Description
Pearl undertakes astudy of variation and correlation in conjugating and non-conjugating specimens of the common ciliate infusorian, Paramecium caudatum, for the purpose of obtaining answers to the following questions: Is the portion of the Paramecium population which is in a state of conjugation at a given time differentiated in respect of type or variability or both from the non-conjugating portion of the population living in the same culture at the same time? Is there any tendency for like to pair with like ('homogamy') in the conjugation of Paramecium, and if so, how strong is this tendency? The material on which this paper is based is comprised in eight series, taken from three different cultures at different times, and includes altogether the measurements of 1894 individual Paramecia. The characters studied are length and greatest breadth of the body, length-breadth index, and the difference in length between the two individuals of a pair of conjugants. In the measuring conjugant pairs are taken at random, and then in each case the two undistorted non-conjugant individuals which are lying nearest in the field of view of the microscope to the conjugant pair are measured. This procedure is followed to avoid any subconscious bias in choosing non-conjugants.
Subject: Biology / Biostatistics
Received 15 November 1905. Read 7 December 1905. Communicated by Karl Pearson.
Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 77 of the Proceedings of the Royal Society B as 'A biometrical study of conjugation in paraœmcium'.
A version of this paper was published by Pearl in Biometrika: Pearl, Raymond. 'A Biometrical Study of Conjugation in Paramecium.' Biometrika, volume 5, number 3 (1907), pp. 213-297.
- Reference number
- AP/77/2
- Earliest possible date
- 1905
- Physical description
- Ink on paper
- Page extent
- 94 pages
- Format
- Typescript
Creator name
Raymond Pearl
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Citation
Raymond Pearl, Unpublished paper, 'A biometrical study of conjugation in Paramaecium [Paramecium]' by Raymond Pearl, 1905, AP/77/2, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/ap_77_2/unpublished-paper-a-biometrical-study-of-conjugation-in-paramaecium-paramecium-by-raymond-pearl, accessed on 06 February 2025
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Related Publications
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A biometrical study of conjugation in paraœmcium External link, opens in new tab.
Date: 27th March 1906
DOI: 10.1098/rspb.1906.0024
Related Records
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Referee's report by George Howard Darwin, on a paper 'A biometrical study of conjugation in paramaecium' by Raymond Pearl
Creator: George Howard Darwin Reference number: RR/16/354 -
Referee's report by Sidney Frederic Harmer, on a paper 'A biometrical study of conjugation in paramecium' by Raymond Pearl
Creator: Sidney Frederic Harmer Reference number: RR/16/355 -
Referee's report by Sydney John Hickson, on a paper 'A biometrical study of conjugation in paramaecium' by Raymond Pearl
Creator: Sydney John Hickson Reference number: RR/16/356 -
Referee's report by Joseph Jackson Lister, on a paper 'A biometrical study of conjugation in paramaecium' by Dr Raymond Pearl
Creator: Joseph Jackson Lister Reference number: RR/16/357
Hierarchy
This item is part of:
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Archived papers: volume 77, scientific papers submitted the Royal Society unpublished or abstracted, 1905-1906
1905-1906 Reference number: AP/77
Related Fellows
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Karl Pearson
Communicator
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Dates: 1768-1989
The 'Archived Papers' collection is comprised of original manuscript scientific papers and letters submitted to the Royal Society which remained unpublished or were abstracted in the journal 'Proceedings of the Royal Society' published from 1830 onwards.View collection