Dental and oral radiography : a text book for students and practitioners of dentistry (1916)
McCoy, James David · St. Louis : Mosby · leaf 38
ld.The presence of this magnetic field is easily dem- MAGNETISM 35 onstrated by placing a magnet under a sheet ofpaper upon which iron filings have been evenlyspread. By tapping the paper lightly, the filingswill form into a series of curved lines extendingfrom one pole of the magnet to the other… … ■ ^4 .- , i ; v \ / / ! » \ \ ^ S \ 11 \ \ ^ ^ / 11, Fig. 6.Diagrammatic illustration of the magnetic lines of force. These lines of force start at one pole of the mag-net, pass in curved lines around to the oppositepole, where they re-enter and pass on through themagnet again, so that if any line…
Radiography, Dental · X-rays · Teeth · Mouth
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