‘The Liquefaction of Air and Research at Low Temperatures (Abstract)’ from Transactions of the Chemical Society, 1896; ‘On the Boiling Point of Liquid Hydrogen under reduced Pressure’ from Proceedings of the Royal Society, vol. 64 [1898]; ‘Application of Liquid Hydrogen to the Production of High Vacua, together with their Spectroscopic Examination’ from Proceedings of the Royal Society, vol. 64 [1898]; ‘Centenary Commemoration Lecture’ from the Royal Institution of Great Britain, 1899; together with Charles Olszewski’s ‘On the Liquefaction of Gases’, offprint from the Philosophical Magazine for February 1895. Together 5 offprints, 8vo. respectively pp. [221]-234, illusts., pp. [227]-231, illusts., pp. [231]-238, illusts., pp. 6, 5 plates & pp. [187]-212, illusts.; very good in the original wrappers (fourth item in stitched self-wrappers), somewhat soiled, first item chipped to upper wrapper, and inscribed “With Comps.”.