Discussion on “high-frequency tests of line insulators” (Imlay and Thomas), and “comparative tests on high-tension suspension insulators” (Sothman), New York, December 13, 1912. (see proceedings for December, 1912)

Ralph D. Mershon: There are a number of things in connection with the paper by Messrs. Imlay and Thomas that are not clear to me, and which I would like to have Mr. Thomas elucidate. For instance, in Fig. 3 of their paper there is shown a metal band around the insulator, and it is said that the effect of that metal band is equivalent to increasing the diameter of the pin. That is not quite clear, neither is it quite clear that putting a cap on the insulator is equivalent to reducing the diameter of the pin, the opposite effect of the band.