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The Royal Society: Science in the Making

Extracts of several letters, regarding a 'naevus maternus' or 'mole' from [Johann Georg] Steigertahl to Hans Sloane

Reference number: CLP/14ii/20

Date: 1725

Description

Steigertahl, physician to the King, shares observations concerning a mole on a man's arm which is thought to have appeared because a branch fell on his mother's right arm when she was carrying him.

Subject: Physiology

Published in Philosophical Transactions as 'Extract of several letters and certificates sent to his Majesty the King of Great Britain, concerning a very particular nævus maternus, or mole. Communicated by Dr. Steigertahl, Physician to his Majesty, F. R. S'

Read to the Royal Society on 10 June 1725

Reference number
CLP/14ii/20
Earliest possible date
1725
Physical description
Ink on paper
Page extent
11 pages
Format
Manuscript

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Citation

Extracts of several letters, regarding a 'naevus maternus' or 'mole' from [Johann Georg] Steigertahl to Hans Sloane, 1725, CLP/14ii/20, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/clp_14ii_20/extracts-of-several-letters-regarding-a-naevus-maternus-or-mole-from-johann-georg-steigertahl-to-hans-sloane, accessed on 13 June 2026

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https://makingscience.royalsociety.org/items/clp_14ii_20/extracts-of-several-letters-regarding-a-naevus-maternus-or-mole-from-johann-georg-steigertahl-to-hans-sloane

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  • Classified Papers

    The 'Classified Papers' of the Royal Society are papers from British and international natural philosophers and scholars categorised according to subject areas.

    Dates: 1592 - 1741

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