Walsh, David · London : Baillière, Tindall and Cox · leaf 30
Fig. 7.—Secondary Cell. … Fig. 8.—Secondary Battery. b. Dynamos This method of obtaining the electric current is open to thosewho have access to either a private or a public lighting supply.The continuous or low tension current, which is sent into the 26 THE RONTGEN RA YS IN MEDICAL WORK house with a voltage of 100 to 250…
X-rays · Radiography
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