16 sept 1879 año - Sir William Crookes (1879) - discovered cathode rays have properties of: traveling in a straight line from the cathode, cause glass to fluoresce, impart a negative charge they touch, are deflected by electric fields and magnets to suggest a negative charge, cause pinwheels in their path to spin indicating the have mass.
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16 sept 1879 año
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~ 144 years ago
