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Alexander Ross Clarke, Henry James: XIII. Results of the comparisons of the standards of length of England, Austria, Spain, United States, Cape of Good Hope, and of a second Russian standard, made at the Ordnance Survey Office, Southampton. With a preface and notes on the Greek and Egyptian measures of length by Sir Henry James. In: Philosophical Transactions of the Royal Society of London. Band163, 1. Januar 1873, S.445–469, doi:10.1098/rstl.1873.0014 (royalsocietypublishing.org [abgerufen am 25. August 2020]).
