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Dental Items of Interest Volume 33; A Monthly Journal of Dental Science, Art and Literature (Paperback) Loot Price: R942
Discovery Miles 9 420
Dental Items of Interest Volume 33; A Monthly Journal of Dental Science, Art and Literature (Paperback): Books Group

Dental Items of Interest Volume 33; A Monthly Journal of Dental Science, Art and Literature (Paperback)

Books Group

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Loot Price R942 Discovery Miles 9 420 | Repayment Terms: R86 pm x 12*

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...both made of aluminum. The exact reason for its action is not known, but the electric current cannot travel through it well except in one direction--from disc to spiral. Thus, to cut out inverse current the disc end of the valve may be attached to the positive terminal tape of the coil, and, by means of a piece of conducting tape, or wire, the spiral end connected with the target side of the tube. Or the disc end of the valve may be attached, with a piece of conducting tape, to the cathode side of the tube and the spiral end of the valve to the negative terminal tape of the coil. (Fig. 52.) It is claimed by some that the valve tube acts only as an additional resistance to the flow of the inverse current cutting it out of the X-ray tube in the same manner that the inverse and multiple spark gaps do. The oscillimeter, or oscilloscope (Fig. 53) is a Osctlitmcter. Geissler vacuum tube with two straight aluminum electrodes. When a unidirectional current passes through it a violet light occurs at the negative electrode. When an alternating current passes through it the light occurs at both electrodes. When the current sent through it is stronger in one direction than in the other the electrodes light unevenly, the brighter electrode representing the negative of the stronger current. The oscillimeter is made to be used between the coil and the tubt, when the latter is covered, to detect inverse current. I have never felt the need of it, though I use an opaque shield over my tube. As has been stated, the X-rays are not discernible Demonstration t0 any tne sPec'al senses. Their existence, howOf X-Rays. ever, can be demonstrated as follows: Place an X-ray tube in a wooden box so that when the current is sent through it no fluorescence can be seen. Excite the tube in ...


Imprint: Rarebooksclub.com
Country of origin: United States
Release date: May 2012
First published: May 2012
Authors: Books Group
Dimensions: 246 x 189 x 19mm (L x W x T)
Format: Paperback - Trade
Pages: 358
ISBN-13: 978-1-231-12713-1
Categories: Books
LSN: 1-231-12713-9
Barcode: 9781231127131

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