Letter from Harold A [Albert] Wilson, Trinity College, Cambridge, to [Joseph] Larmor He thanks Larmor for his solution of the rotating dialectric cylinder problem. His own solution was a rough approximation and he intended to get a complete solution if he could. He thinks Larmor's is right, provided there are no algebraic slips. He has kept a copy to work on soon. He comments of the sliding contact between the cylinders. Wilson does not think he will get the Cambridge Scientific Instrument Company to make the apparatus, after his experience with a galvanometer of theirs which was 'a complete failure and almost useless'. 15 May 1903