Walsh, David · London : Baillière, Tindall and Cox · leaf 46
scence of the tube and a diffuseproduction of the invisible #-rays. The form now adopted in alltubes is that introduced by Mr. Herbert Jackson, who focussedthe kathode rays on a platinum target inside the tube, and so ELECTRICAL APPARATUS AND METHODS 39 procured .r-rays in greater abundance and… … Fig. 17.—Focus Tube for Contimuous Current.*
X-rays · Radiography
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