When is enough enough? Accurate measurement and the integrity of scientific research.

At a meeting of the Physical Society of London in 1925 participants expressed their concerns regarding a recent suggestion by the Australian physicist T. H. Laby for replicating the established value of the mechanical equivalent of heat. This rather controversial discussion about the value of redetermining this numerical fact brings to light different understandings of the moral economy of accuracy in scientific work; it signals a distinctive new stage in the historical understanding of accuracy and precision and the moral integrity in conducting research.