Abstract
Formulas are given, with examples, for the following new problems in proximity effect resistance ratio: Thin Tube and Infinitesimal Wire; Two Thin Tubes in Return Circuit; Two Thin Tubes in Parallel; Insulated Cable Sheaths in Single-Phase Circuit; Cable Sheaths in Three-Phase Circuit, Flat Spacing; Finite Wire and Infinitesimal Wire; Two Wires in Parallel; Three-Phase Circuit, Triangular Spacing; Three-Phase Circuit, Flat Spacing. Reduction formulas for Bessel functions, suitable for skin effect problems, are tabulated, and a table of values of the first five orders, for use in drawing curves, is given.

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