THOMSON, Joseph John. Conduction of Electricity through Gases, Cambridge: University Press, 1903, FIRST EDITION, illustrations, original green cloth (extremities rubbed). [Dibner 165; Norman 2076; PMM 386] -- J. F. W. HERSCHEL. "Light", [London, 1827], in Encyclopaedia Metropolitana, London: B. Fellowes [and others], 1845, 4° (light spotting), contemporary half calf (rebacked) -- Report of the Twelfth Meeting of the British Association for the Advancement of Science, held at Manchester in June 1942, London: John Murray, 1843, 8°, contemporary boards (rebacked), partly unopened and uncut. With Ellis' Memoir of Sir Benjamin Thompson (Boston, 1871), 14 offprints relating to Baron Kelvin, and 10 other offprints, including 5 by H. von Helmholtz. (27)