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A 539. The Electrical Conductivity and Luminosity of Flames Containing Salt Yapours. By H. A. 
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A 540. The Threshold of Vision for Different Coloured Lights. By Sir W. de W. Abney, K.C.B., 
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A 541. On Certain Linear Differential Equations of Astronomical Interest. By Prof. H. F. Baker, 
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A 542. Discussion of Kew Magnetic Data, especially the Diurnal Inequalities of Horizontal Force and 
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A 543. On the Law of Distribution of Molecular Velocities, and on the Theory of Viscosity and Thermal 
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B 336. The Development of the Thymus, Epithelial Bodies, and Thyroid in the Marsupialia. 
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