arch 29. John G.McKendrick, Walter Colquhoun, in Nature. « < » > » TWO HOME MADE WIRELESS TELEGRAPH RECEIVERS. Wireless telegraph receivers or kumascopes, toadopt the name given them by Prof. Fleming, nearlyall depend upon the principle of an imperfect contact ina local circuit being made… … shown in Fig. 1, which only requires two bindingposts, two pieces of No. 12 aluminium wire, and alarge sewing needle. The wires A are supported atan angle with each other, as shown in the diagram,and across them lies the needle B. The kumascqpeis connected up in the usual way to a telephone…
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