Cathode Rays and Some Analogous Rays . wire v^hen hot * A similar observation has been made by Villaei (Eendiconti deila IL Accademia dei Lincei/vol. 5, May 17, 1896), who has investigated the external electrostatic state of BoNTGEN tubes andGeisslek tnbes by the use of elecfcroscopic powders^ Al^B SOME ANALOGOUS B,AYS. 479 yielded a slightly larger shadow than when cold. But this could not be determinedwith certainty. 5. Attempts to Concentrate Cathode Bays. The concentration of cathode rays by the use of concave cathodes to focus the beamdates from the classic researches of Crookes.^^ In the
Cathode Rays and Some Analogous Rays . wire v^hen hot * A similar observation has been made by Villaei (Eendiconti deila IL Accademia dei Lincei/vol. 5, May 17, 1896), who has investigated the external electrostatic state of BoNTGEN tubes andGeisslek tnbes by the use of elecfcroscopic powders^ Al^B SOME ANALOGOUS B,AYS. 479 yielded a slightly larger shadow than when cold. But this could not be determinedwith certainty. 5. Attempts to Concentrate Cathode Bays. The concentration of cathode rays by the use of concave cathodes to focus the beamdates from the classic researches of Crookes.^^ In the experiments now made it wassought to concentrate the rays by other means. The first of these means wasreflexion from the surface of a non-conductor-—glass--~-at a small grazing angle. Atube [No. G 20], (fig. 13), was prepared, within which was suspended by platinumlinks an inner funnel of glass, about 47 millims. long, having an internal diameterof 12 millims. at the larger, and 8 milhms. at the smaller end. The suspension Fig. Fig. 16.
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Keywords: ., bookcentury1800, bookdecade1890, bookidphiltrans073, bookyear1897
