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15. A Kesoiiance Method of Measuring the Constant of Gravitation. Nature, 

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16. On a Method of Determining the Absolute Density of a Gas. Proc. R.D.S. 

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17. The Abundance of Life. Proc. E.D.S. 1891. 



18. On the Determination of the Melting-Points of Minerals. Proc. E.I. A. 

 1891. 



19. Crystals of Platinum and Paladium. Nature. April 9, 1891. 



20. On the Specific Heats of Gases at Constant Volume. Part I. Phil. Trans., 

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21. On a Direct Reading Electrolytic Ampere Meter. Proc. R.D.S. 1892. 



22. On a Mercury Glycerine Barometer. Proc. E.D.S. 1892. 



23. On Shutters for Use in Stellar Photography. Proc. R.D.S. 1892. 



21. On a Speculation as to a Prematerial Condition of the Universe. Proc. 

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25. On the Bright Colours of Alpine Flowers. Proc. E.D.S. 1898. 



26. On a Photographic Method of Detecting the Existence of Variable Stars. 

 Proc. E.D.S. 1893. 



27. On the Influence of Temperature upon the Sensitiveness of the Photo- 

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28. On the Specific Heat of Gases at Constant Volume. Part II. Phil Trans. 

 R.S. 1894. 



29. On the Thermal Expansion of Diamond. Nature, 1894. 



30. On Useful Methods of Teaching Elementary Physics. Proc. E.D.S. 1894. 



31. The Ratio of the Latent Heat of Steam to the Specific Heat of Water 

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32. With H. H. Dixon.— On the Ascent of Sap. Phil. Trans. E. S. 1895. 



33. With H. H. Dixon. — On the Path of the Transpiration Current. Annals 

 of Botany, Sept. 1896. 



34. On a Method of Photography in Natural Colours. Trans. E.D.S. 1896. 



35. On the Geological Investigation of Submarine Rocks. Proc. R.D.S. 1897. 



36. On the Origin of the Canals of Mars. Trans. R.D.S. 1897. 



37. On the Volume Change of Rocks and Minerals attending Fusion. Trans. 

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38. A Theory of Sun-Spots. Proc. R.D.S. 1898. 



39. With H. H. Dixon. — On Some Minute Organisms found in the Surface 

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40. An Estimate of the Geological Age of the Earth. Trans. E.D.S. 1899. 



