Dental and oral radiography : a text book for students and practitioners of dentistry (1916)
McCoy, James David · St. Louis : Mosby · leaf 29
the chemically covered cardboard on the oth-er side of the room was glowing with a wierd flo-rescence. He approached the cardboard and indoing so passed between it and the Crookes tube,and beheld his shadow upon the cardboard. Pick- 26 DENTAL AND ORAL RADIOGRAPHY ing np a book, he held it in front… … Fig. 4.Ileinrich Hertz. tube operating, he picked np the cardboard andwhile examining it, noticed the shadow of his handon its surface, the bones appearing much darkerthan the soft parts of the hand. He also foundthat the florescence was produced in the card-board regardless of whether the…
Radiography, Dental · X-rays · Teeth · Mouth
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