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A term formerly employed to denote the [[Capacity|capacity]] of a set in a Euclidean space  $  \mathbf R  ^ {n} $, 
obtained by the method of classical [[Potential theory|potential theory]] with the aid of the [[Newton potential|Newton potential]] for  $  n \geq  3 $, 
or the [[Logarithmic potential|logarithmic potential]] for  $  n = 2 $, 
as distinct from the [[Analytic capacity|analytic capacity]] or capacities obtainable using other types of potentials.