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Ce livre historique peut contenir de nombreuses coquilles et du texte manquant. Les acheteurs peuvent generalement telecharger une copie gratuite scannee du livre original (sans les coquilles) aupres de l'editeur. Non reference. Non illustre. 1898 edition. Extrait: ... a part of the wall of the tube emit rays, although to a very small extent. Cathode rays proceed from the cathode in all directions; their intensity, however, is important only in the neighborhood of the axis of the concave mirror; and therefore the most intense X-rays originate on the platinum plate at the point where this axis meets it. If the tube is very hard and the platinum thin, a great many X-rays are emitted from the rear side of the platinum plate, and, as is shown by a pin-hole camera, from a point which also lies on the axis of the mirror. In these hardest tubes, also, the maximum of intensity of the cathode rays can be deflected from the platinum plate by means of a magnet. Some experiments on soft tubes led me to take up again, with better apparatus, the question of the possibility of magnetic deflection of X-rays; I hope to be able to communicate soon the results of these experiments. The experiments mentioned in my first communication on the transparency of plates of the same thickness which are cut from a crystal according to different directions have been continued. I have investigated plates of calcite, quartz, tourmaline, beryl, aragonite, apatite, and barite. No influence of direction on the transparency could be detected even with the improved apparatus. The fact observed by Herr G. Brandes, that the X-rays can produce a light-sensation in the retina of the eye, I have found confirmed. There stands also in my observation-journal a note at the beginning of the month of November, 1895, according to which I perceived a feeble light-sensation, which spread over the whole field of vision, when I was in an entirely darkened room near a wooden door on the other side of..."
| ISBN-13 | 9781151324603 |
|---|---|
| ISBN-10 | 1151324604 |
| Weight | 0.24 Pounds |
| Dimensions | 9.00 x 6.00 x 0.15 In |
| List Price | $9.02 |
| Format | Paperback |
|---|---|
| Pages | 64 pages |
| Publisher | |
| Published On | 2009-12-01 |
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