Letter from [Hugh Longbourne] Callendar, Imperial College of Science and Technology, Royal College of Science, South Kensington, London, S.W Requests a proof of Dr [Howard Turner] Barne's paper "On the so called Thermoid Effect". Informs that the last time he saw Barnes, he agreed with his answer to Bousfield wouldbe sufficient. Highlightsit is a pity they are both sending papers on the same point, independently. States he asked Barnes to make a special test of the platinum silver coil, and to send him the result. 6 February 1912