There is a terrible and continuing increase in the  numéro  of  machine  parts needed to accomplish of the relatively simple task of moving ideas as moving pictures through the air. Here, 4 doubled boxes separated by black space have become 12 completely connected, heavily vibrating transmitters. Fortunately, increased demand keeps the price down.     Le récepteur changeait le son en images mobiles des morts, qui pouvaient flotter, libres et vivants, dans l'air.