Excerpt from Clark and Weston Standard Cells
The need of a definite and universal system of electrical units was early recognized. Owing to its preponderating importance in the earlier applications of electricity, the unit of resistance naturally received first attention. The... committee on electrical standards appointed by the British Association in 1861 recommended the adoption of the C. G. S. Electromagnetic system together with a practical system defined as decimal multiples and submultiples of the C. G. S. Units. In addition, its labors led to the construction of concrete standards of resistance in the form of coils of platinum silver of special design adjusted to represent 109 C. G. S. Units as determined by a series of absolute measurements.
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