Gernsback, Hugo, 1884-1967, ed · New York : [s.n.] · leaf 27
volt house circuit, it available on the market, should be us«i, soldered to it the main wire in the circuit. is a difticult matter to rig up an electrical and if the reader has not this instrument, he The metal disc or washer shown in Fig. 2, Christmas Tree display, even with only six may readily… … for short distances in experiments whereby The Electrical Xmas Tree Can Be Made Twice as Charming by Arranging It to Revolve messages were transmitted from one height In the Manner Illustrated. The Groups of Lamps Blink on and off Alternately, Giving a to another across valleys in the Cumber- Most…
