United States or Luxembourg ? Vote for the TOP Country of the Week !
Besides mapping out the size of the heart by roentgenoscopy and studying the contractions of the heart with the fluoroscope, and a detailed study of sphygmographic and cardiographic tracings, which methods are not available to the large majority of physicians, there are various methods of approximately, at least, determining the strength of the heart muscle. Int.
It consists simply of a closed box with an opening to which the eyes are placed. The opposite end of the box is a piece of board coated with a salt such as platino-barium cyanide. When the X-ray strikes this salt it makes it glow, or fluoresce, and objects held between the X-ray tube and the fluoroscope cast shadows according to the density of the parts which the X-rays penetrate.
He took the bomb and carefully placed it under the wonderful rays, then with the fluoroscope over his eyes studied the shadow cast by the rays on its sensitive screen. For several minutes he continued safely studying it from every angle, until he thoroughly understood it. "It's a bomb, sure enough," Craig exclaimed, looking up from it at last to me.
The same journal in its issue of April 1, 1896, shows an Edison fluoroscope in use by an observer, in the now familiar and universal form somewhat like a stereoscope. This apparatus as invented by Edison consists of a flaring box, curved at one end to fit closely over the forehead and eyes, while the other end of the box is closed by a paste-board cover.
With the lead-glass bowl removed, the X-ray tube sent forth its wonderful invisible radiation and made the back of the fluoroscope glow with light. I could see the bones of my fingers as I held them up between the X-ray tube and the fluoroscope. But with the lead-glass bowl in position over the tube, the fluoroscope was simply a black box into which I looked and saw nothing.
Shortly after Röntgen's discovery, Edison, with that wonderful power of finding practical applications for nearly all discoveries, had invented the fluoroscope, a screen covered with a peculiar chemical substance that becomes luminous when exposed to the Röntgen rays.
In Kennedy's laboratory I was watching Craig make some experiments with a new X-ray apparatus which had just arrived, occasionally looking through the fluoroscope when he was examining some unusually interesting object. We were oblivious to the passage of time, and only a call over our speaking tube diverted our attention. I opened the door and a few seconds later Long Sin himself entered.
I admit I wouldn't believe it until I had a look at your foot bones under the fluoroscope." Vorongil said quietly, "Bartol I don't suppose that's your real name why did you do it?" "I couldn't see you all die, sir," Bart said, not expecting them to believe him. "No more than that." The medic said roughly in Lhari, "It's a trick, sir, no more. A trick to make us trust him!"
It may be remarked that this collection includes the eighteen hundred or more fluorescent salts made by Edison during his experimental search for the best material for a fluoroscope in the initial X-ray period.
When Roentgen came forward with his discovery of the new "X"-ray in 1895, Edison was ready for it, and took up experimentation with it on a large scale; some of his work being recorded in an article in the Century Magazine of May, 1896, where a great deal of data may be found. Edison says with regard to this work: "When the X-ray came up, I made the first fluoroscope, using tungstate of calcium.
Word Of The Day