Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 209
whenever two subscribers are connected, inasmuch as thevery purpose for which they exist requires them to be always insuch circuits. Neither can it be overcome by placing the drops atsuch a distance from one another that this induction will not befelt, for the limited space on switch-boards… … FIG. 168.-THE WARNER TUBULAR DROP. vicinity. This has been accomplished in several ways, but the bestexample is that shown in Fig. i68, which illustrates what is knownas the Warner Drop. In this the coil is wound in the ordinary man-ner on a soft-iron core and is then encased in a tubular shield,…
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