London, Edinburgh und Dublin Philosophische Zeitschrift und Zeitschrift für Wissenschaft . Kurve Nr. 5. 4-0 3-0 25 g3 1-0 ? 1 PILLE HIM IIHIIM BHHHHHU HI11 ?????????? : : ;-------------------. ?? X 5 r<t^ ^f^ ik^r^ffui 30 32 34 36 38 40 42 44Working Volts of Lamp. Von der Platte. Wenn das Bein neben der Aluminiumplatte negativ ist, ist der Strom bei einer bestimmten Spannung der Lampe konstant. § 15. Aus den oben genannten Experimenten geht hervor, dass die bei der Verbindung eines Galvanometers zwischen der Ametallplatte und der positiven Elektrode der Lampe erzielte Elektrode 80 Prof. J. A. Fleming am in beträgt

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The London, Edinburgh and Dublin philosophical magazine and journal of science . Curve No. 5. 4-0 3-0 25 g3 1-0 ? 1 pill HIM IIHIIM BHHHHU HI11 ???????? : | ; | flBKBKBB . ?? x 5 r<t^ ^f^ ik^r^ffui 30 32 34 36 38 40 42 44Working Volts of Lamp. from the plate. When the leg adjacent to the aluminiumplate is the negative one then the current is steady at anydefinite voltage of the lamp. § 15. From the above experiments it is clear that thecurrent obtained when a galvanometer is connected between ametallic plate and the positive electrode of the lamp is greater 80 Prof. J. A. Fleming on the in proportion as the collecting-plate is larger and in propor-tion as it is brought into close proximity to the base of thenegative leg of the carbon. Also that a plate so placed isbrought down to the potential of the negative electrode.^ Itseemed desirable to see how far the removal of the collecting-plate to a great distance from the negative leg would influencethese results, and experiments were accordingly tried with atube of the form shown in fig. 11.. Experiment 12.—In this case a glass tube about eighteeninches long and three-quarters of an inch in diameter wasattached to a lamp bulb. The end of the glass tube furthestfrom the bulb was closed and an aluminium plate welded to aplatinum wire was sealed in near this closed end. The platehad a length of about 3 centimetres and a wudth of about1 centimetre. The tube formed an extension of the bulb-space, and accordingly this arrangement formed a device bywhich a metal plate could be removed to a distance of someeighteen inches from the incandescent conductor contained inthe bulb. On placing this lamp on a circuit and bringingthe carbon to normal incandescence and connecting the ter-minals of the Elliott galvanometer respectively to the aluminiumplate and the positive electrode of the lamp, a very smallcurrent was found to be passing through it, not, however, exceeding one ten-thousandth of a milliampere. When thegalvanometer w

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• bookcentury1800
• bookdecade1840
• bookidlondon
• booksubjectscience