Letter from Silvanus Phillips Thompson, University College, Bristol, to [William Fletcher] Barrett Is pleased that his suggestion of using the motograph telephone as a transmittor was successful. His failure to secure a Birmingham post, although he 'ran Poyting closely'. Describes the Trevelyan Rocker and draws Barrett's attention to de Fonvielle's 'very stupid' attack on Crookes' radial matter and kinetic theory of gases. 28 February 1880