ABSTRACT
So far I have paid piece rates for the operation (Laplacian) of about H/18 pence per coordinate point, n being the number of digits. The chief trouble to the computers has been the intermixture of plus and minus signs. As to the rate of working, one of the quickest boys averaged 2000 operations (Laplacian) per week, for numbers of three digits, those done wrong being discounted. L. F. Richardson. The Approximate Arithmetical Solution by Finite Differences of Physical Problems Involving Differential Equations, with an Application to the Stresses in a Masonry Dam. Trans, of the Royal Soc. of London, 1910, Ser. A, V. 210, pp. 307-357.
