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heat we are told? Electrometers show that the electrical current passes through some poor conductor, a platinum wire say and heats the latter. Precisely the same quantity of electricity, there being no loss of electricity, no decrease. What then has been converted into heat? Again electricity is said to produce magnetism. 

I have on the table before me primitive electrometers in whose vicinity chelas come the whole day to recuperate their nascent powers. I do not find the slightest decrease in the electricity stored. The chelas are magnetized, but their magnetism or rather that of their rods is not that electricity under a new mask. No more than the flame of a thousand tapers lit at the flame