X-ray apparatus : complete outfits and accessories for X-ray laboratories (1908)
Kny-Scheerer Company · New York : Kny-Scheerer · leaf 18
G/..5535 G/..5540/41 Since Professor Wehnelt discovered that an electric current sent through an electro-lyte by means of two electrodes of unequal surface area, under a voltage largely surpass-ing polarization tension in opposite direction, produces perfect interruption of the circuit,and since…
X-rays · Radiography
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