DescriptionBall electroscope.jpg English: https://www.coe.ufrj.br/~acmq/hvmeasurements/ By Dr. Antônio Carlos M. de Queiroz (in memoriam). https://www...
DescriptionWilson's Electrostatic machine with ball electroscope I.jpg English: By Dr. Antônio Carlos M. de Queiroz (in memoriam). http://www.coe.ufrj...
DescriptionWilson's Electrostatic machine with ball electroscope III.jpg English: By Dr. Antônio Carlos M. de Queiroz (in memoriam). http://www.coe.ufrj...
DescriptionWilson's Electrostatic machine with ball electroscope II.jpg English: By Dr. Antônio Carlos M. de Queiroz (in memoriam). http://www.coe.ufrj...
of electricity. Figure 115. Cavallo's Pith Ball Electroscope not so delicate as the Gold-leaf Electroscope, but is very serviceable for likewise detecting...
Electrostatic instruments.jpg English: The picture above shows some measurement instruments used by Alessandro Volta. A pith ball electroscope, an electric force...
strengthof the charge. The electroscope is now ready for use. If a positively chargedbody is brought near the disk of the electroscope, the leaves willdiverge...
it near an electroscope, as shown in Fig. 15, theleaves will close, or converge, owing to the difference of the chargeon the electroscope and the rod...
charged ball near enough to the elec-troscope to affect it; now hold an insulated needle against the ball,pointing it toward the disk of the electroscope, and...
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