The capacity of twin cable
6 From a letter of Professor V. A. Bailey we have learnt (in May 1941) that this problem has been dealt with in some special cases by E. Netto in his Vorlesungen iiber Algebra vol. I, Teubner, Leipzig, 1896, p. 300. In the same letter Bailey has given an elegant solution of the problem which, however, does not suit our present purpose. Further he has drawn our attention to the paper by L. Sancery, De la methode des substitutions successives pour le calcul des racines des Equations, Nouvelles Annales d. Math.. (2) 1, 30S-31S (1862), which, however, was not accessible to us.