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A 538. The Monoclinic Double Sulphates Containing Ammonium. Completion of the Double Sulphate 
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A 539. The Electrical Conductivity and Luminosity of Flames Containing Salt Vapours. 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 
Vertical Force, from Ordinary Days of the Eleven Years 1890 to 1900. By C. Chree, Sc.D., 
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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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A 544. The Newtonian Constant of Gravitation as Affected by Temperature. By P. E. Shaw, B.A., 
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A 545. The Combining Volumes of Hydrogen and Oxygen. By F. P. Burt, D.Sc., and E. C. Edgar, 
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B 339. The Measurement of the Bate of Heat-Loss at Body Temperature by Convection, Radiation, and 
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B 340. The Spread of the Excitatory Process in the Vertebrate Heart. Parts I-V. By Thomas Lewis. 
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B 341. The Monotreme Skull: A Contribution to Mammalian Morphogenesis. By D. M. S. Watson, 
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B 342. Observations on Coprozoic Flagellates : together with a Suggestion as to the Significance of the 
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B 343. On the Relation between Transpiration and Stomatal Aperture. By Sir Francis Darwin, 
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B 344. On the Structure and Development of the Skull and Laryngeal Cartilages of Perameles, with 
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B 345. The Electrical Conductivity of Echinoderm Eggs, and its Bearing on the Problems of Fei'tilisation 
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