. Bulletin of the scientific laboratories of Denison University. lO BULLETIN OF THE LABORATORIES not too great, will be proportional to the heating effect producing it and this in turn, to the oscillations in the wires ww'. The galvanom- eter deflections become therefore a direct measure of the intensity of the electrical oscillations.^ To avoid disturbing the wave system in the wires, Rubens did not attach the wires ^v v^ from the dynamo-bolometer directly to the points of the parallel wires to be investigated, but to little jars, made by plac- ing around the wires bits of glass tube surround
. Bulletin of the scientific laboratories of Denison University. lO BULLETIN OF THE LABORATORIES not too great, will be proportional to the heating effect producing it and this in turn, to the oscillations in the wires ww'. The galvanom- eter deflections become therefore a direct measure of the intensity of the electrical oscillations.^ To avoid disturbing the wave system in the wires, Rubens did not attach the wires ^v v^ from the dynamo-bolometer directly to the points of the parallel wires to be investigated, but to little jars, made by plac- ing around the wires bits of glass tube surrounded by shorter strips of metal foil as " outer coatings," the wires themselves forming the "inner ; With this apparatus, larger galvanometer deflections, ob-. FlG. 2. tained when the bridge wire is at a node, correspond to the glowing of the Geissler tube in Lecher's arrangement. The wave distribution along the parallel wires was studied as fol- lows : The Leyden jars were placed over the ends of the wires, a bridge of wire placed in a definite position across the wires (as shown by a tape measure stretched below), current sent through the induc- tion coil, and the galvanometer deflection produced by the heating of the dynamo-bolometer read. This was repeated three or four times for each bridge position, and bridge positions taken 5 to lo cm apart over I. Rubens and Paalzow, I. c, Vol. XXXVII, p. 529, (1889.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Denison University; Denison Scientific Association. Granville, Ohio : [The University]
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