Nikola Tesla Books
200 HIGH FREQUENCY APPARATUS of beeswax is rubbed lightly across its surface to provide a thin and even coating. A sheet of tinfoil is immediately placed in the center of the glass and rubbed into close contact with the pounce, starting at the center and, with a circular motion, working out toward the edges. This will result in a perfect union of glass and foil at all points. The plate is immediately reversed and the other side coated in like manner before the plate gets too cold to melt the wax. The remainder of the plates are to be treated in a similar manner when they are ready for the connecting lugs, after having had their edges dipped in melted wax far enough to cover the edges of the foil for a space of an inch or so to prevent brush leakage. The lugs are of thin copper ribbon, tinned at one end and affixed electrically to the tinfoil at alternate ends on both sheets of foil with a deft application of the soldering copper. A little practice on a scrap plate will soon enable the worker to master the operation of soldering the copper to the foil without melting the latter. The drawings in Fig. 14 illustrate the location of the connecting lugs and also the way in which ten plates are piled one on top of the other to form a complete unit. This assembling having been done with the entire lot of plates, the projecting lugs may be clamped with the pliers and soldered to short lengths of copper ribbon ready for connection with the bus-bars of the condenser. The plates of each unit should be bound with tape to afford mechanical strength and ease of handling. A plain piece of glass is placed on either side of each unit under the binding tape. The twelve units are to be assembled in a strong wooden case and each unit should be separated from its neighbor by strips of wood covered with felt. Connections are made as shown in Fig. 13, to bus-bars consisting of several strips of copper ribbon fastened together. The connec
