Mrs Janet Taylor's 'Mariner's Calculator': Assessment and reassessment

John S. Croucher*, Rosalind F. Croucher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Vanished from history is the story of the 'Mariner's Calculator', invented and patented at the Great Seal Patent Office, London, by Mrs Janet Taylor, in 1834. Dismissed by the Admiralty, it had no commercial future and only one instrument is known to remain in existence. The article traces the invention from its inception and provides relevant biographical details of its inventor. The authors then analyse the assessment by the Admiralty to determine if it was fair and outline the endeavour in 2004 to reassess the achievement by a reconstruction of the Mariner's Calculator from its original patent.

Original languageEnglish
Pages (from-to)493-507
Number of pages15
JournalBritish Journal for the History of Science
Issue number4
Publication statusPublished - Dec 2011

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