John Richardson, saccharometry and the pounds-per-barrel extract: The construction of a quantity

    Research output: Contribution to journalArticlepeer-review


    This paper uses the work of John Richardson, an eighteenth-century brewing theorist, to explore the view that physical quantities, though they appear 'natural' or 'given', are actually contingent entities constructed to serve particular aims. It focuses on the pounds-per-barrel extract, a brewery-specific quantity which, in a reversal of the familiar position, seems self-evidently constructed to the general reader yet came to be accepted as 'natural' among its users. Central to Richardson's work in achieving this acceptance was an instrument, the saccharometer, which, by providing measurements of the quantity, legitimated it. Richardson presented both instrument and quantity as tailored to serving the particular needs of his fellow brewers, at the same time emphasizing their separateness from parallel work in distillery assessment, which had made Richardson's innovation possible but now threatened his projected consensus. Richardson's overall project encompassed the direct proportionation of material costs, retail prices and Excise duties to extract values as defined by the saccharometer, which he sought to monopolize. The scheme was not wholly successful, yet Richardson's quantity remained in brewery use into modern times. The end result, I contend, shows how a quantity, by becoming naturalized, may survive the loss of its initial theoretical underpinning.
    Original languageEnglish
    Pages (from-to)255-273
    Number of pages18
    JournalBritish Journal for the History of Science
    Issue number3
    Publication statusPublished - Sept 2001


    Dive into the research topics of 'John Richardson, saccharometry and the pounds-per-barrel extract: The construction of a quantity'. Together they form a unique fingerprint.

    Cite this