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zoobyshoe
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"If a student stands on an insulated platform - an inverted battery jar will do - and is struck several times on the back with a piece of fur, his body becomes charged to a potential of several thousand volts above ground, and a 2 cm spark can be drawn from knuckles or ear, greatly to the amusement of the class. If the student holds a key tightly in his hand, sparks may be drawn from the key without causing him discomfort. The instructor may present to him a grounded Bunsen burner and let him ignite the gas by the spark."
-Demonstration Experiments in Physics
Richard Manliffe Sutton, Ph. D.
McGraw-Hill, 1938
-Demonstration Experiments in Physics
Richard Manliffe Sutton, Ph. D.
McGraw-Hill, 1938