Robison's Manual of radio telegraphy and telephony for the use of naval electricians (1918)
Robison, S. S. (Samuel Shelburne), b. 1867, United States Naval Institute, Todd, David Wooster, Hooper, Stanford Caldwell · Annapolis, Md. : The United States Naval Institute · leaf 52
will be observed that the point of support of the rope, where itcan not move, must, in every case, be a node. So in a conducting wire,the end of the wire away from that receiving the impulses must be acurrent node, because no current can flow there. It can, however, and alittle consideration will… … FiQ. 18d. Since the electrical impulses consist of variations of current andpotential, which succeed each other regularly, and since at a given pointwe find a loop of potential and a node of current, we must, at a quarter-wave length distant, find a node of potential and a loop of current. This is…
