Mowat, Harold, 1883- · London : H. Frowde · leaf 25
is placed under the fluorescent 10 X-RAYS : THE PRODUCTION screen, the shadow of the standard silver disk shouldcorrespond to a sector of medium thickness. If thetube is hard, the standard shadow will correspondto a thicker section of the aluminium, and if soft toa thinner one owing to the lack of… … Fig. 4, Benoists Radiometer.a. Silver, h, Aluminium. Another method, which we will now consider, isdependent on a further factor, namely that theharder the tube the more resistance does it offer tothe passage of a current. This method is known as that of the equivalentspark-gap, and is explained by…
X-rays
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