Additional discussion

Eric T. B. Gross (Rensselaer Polytechnic Institute, Troy, N. Y.): The discussion on page 355 of these Transactions (July 1963) was printed there by mistake. It was not prepared for the paper published on pages 346 to 354, but submitted as discussion of another paper¹ in order to establish the historical facts for these methods of finding the equivalent impedance of two impedances connected in parallel, which were missing in that other paper.¹ All the methods in the paper under discussion, on pages 346 to 354, are based on the early work of Orlich² and of Rukop.³ Figs. 1 and 3 on page 347 are the methods suggested by Orlich.² Fig. 10 on page 349 is the more general method suggested by Rukop.³ The original papers by Orlich and Rukop contain full proofs of all their constructions.