Tunzelmann, George William von, 1856- · New York, Scribner & Welford · leaf 167
^l.COLLISftC Fig. 40.cube of wood, hollowed out in a conical form, and havingthe smaller end of this hollow closed with a very finestretched membrane. A narrow springy strip of platinumfoil was attached to the upper binding screw, as shown inthe diagram, while its lower end rested against the… … 154 ELECTRICITY IN MODERN LIFE. by means of the adjusting screw shown in the illustration,was made to just touch the lower end of the first platinumstrip. The two binding screws were placed in circuit with thebattery and with the line through which messages were tobe sent. Reiss original receiver,…
Electric industries · Electricity
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