Abstract
IN recent years, there has been a considerable development in the design and use of mechanical and electrical instruments for carrying out calculations of various kinds. These calculations can be divided into two main groups: first, there are those which consist of the four processes of arithmetic (addition, subtraction, multiplication and division) combined in any way, and secondly there are those which involve the further ideas of the calculus. For the latter group of calculations, the solution of differential equations is one of special importance both in pure and in applied science, as in both fields there arise many kinds of differential equations which have no formal solution or none convenient for numerical evaluation, but for which quantitative information about the behaviour of the solution is required.
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The Differential Analyser in Electrical Engineering. Nature 143, 36 (1939). https://doi.org/10.1038/143036a0
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DOI: https://doi.org/10.1038/143036a0