Geitel sentence example
- Lenard, Elster and Geitel, and others have found the potential gradient negative near waterfalls, the influence sometimes extending to a considerable distance.
- The Elster and Geitel apparatus is furnished with a cover, serving to protect the dissipator from the direct action of rain, wind or sunlight.
- In 1901 Elster and Geitel found that a radioactive emanation is present in the atmosphere.
- After two hours' exposure, it is wrapped round a frame supported in a given position relative to Elster and Geitel's dissipation apparatus, and the loss of charge is noted.
- Annual and Diurnal Variations.-At Wolfenbi ttel, Elster and Geitel found A vary but little with the season.Advertisement
- This last result of course is favourable to Elster and Geitel's views as to the source of the emanation.
- For a wire exposed under the conditions observed by Elster and Geitel the emanation seems to be almost entirely derived from radium.
- Geitel (7) that even the most perfectly insulated conductors lose their charge, and that this loss depends on atmospheric conditions.
- Elster and Geitel (35) have measured the charge carried by raindrops falling into an insulated vessel.
- Elster and Geitel found the sign of the charge often fluctuate repeatedly during a single rain storm, but it seemed more often than not opposite to that of the simultaneous potential gradient.Advertisement
- This was confirmed by Elster and Geitel (7), whose form of dissipation apparatus has been employed in most recent work.
- At Wolfenbtittel, a year's observations by Elster and Geitel (56) made A vary from 4 to 64, the mean being 20.
- Elster and Geitel (58), having found air drawn from the soil highly radioactive, regard ground air as the source of the emanation in the atmosphere, and in this way account for the low values they obtained for A when observing on or near the sea.
- Similarly at Altjoch, Elster and Geitel (56) found A at the foot of a waterfall only about one-third of its normal value at a distance from the fall.
- St Elmo's Fire.-Luminous discharges from masts, lightning conductors, and other pointed objects are not very infrequent, especially during thunderstorms. On the Sonnblick, where the phenomenon is common, Elster and Geitel (87) have found St Elmo's fire to answer to a discharge sometimes of positive sometimes of negative electricity.Advertisement