Abstract

ONE of our electrical contemporaries across the Channel gives a glowing description of une grande machine électrique allemande, which its editor says he wishes to see introduced into France, “where our official professors appear to have lost all ambition at making things big.” The great gooseberry of the season is nothing to this new machine, which is, we are told, composed of twenty parallel disks of 1,300 metres in radius. This is “making things big” with a vengeance, for the diameter of the disks will be over 21/2 kilometres, or about a mile and a half. Did our contemporary make a double blunder when it wrote “treize cents mètres”? If we remember rightly, the plates in Topler's induction-machine, which appears to be the one referred to, are not far from 13 centimetres radius.

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