Contents. ix 



PAGE 



Note on Prof. Rowland's paper on spherical waves of light and the 

 dynamical theory of diffraction (Phil. Mag. Vol. xvm. June, 1884). 



By E. F. Gwyther 296 



On plane waves of the third order in an isotropic elastic medium, with 



special reference to certain optical phenomena. By Prof. Pearson 296 



Preliminary note on the theory of explosions. By B. Threlfall . . 309 



Observations and Statistics. By F. Y. Edge worth . . . .310 



Note on Mr Ibbetson's paper " On the free small normal vibrations of 



a thin homogeneous and isotropic elastic shell, bounded by two 



confocal spheroids." Correction by the author .... 312 



October 26, 1885. 



On the measurement of kinetic molecular energy on an absolute scale. 



By Professor Liveing 316 



On the transit of Venus, Dec. 6, 1882. By Dr J. B. Pearson . .321 



November 9, 1885. 



On Weissmann's New Theory of Heredity. By A. Sedgwick . .321 

 Suggestions with regard to the nervous system of the Chordata. By 



W. Bateson 321 



On the nature of the Heart-Sounds. By F. J. Allen . . . .321 

 On the travelling of the Transpiration-Current in the Crassulacese. By 



F. "W. Oliver 323 



On the constitution of the walls of vegetable cells and the degeneration 



changes occurring in them. By W. Gardiner 323 



November 23, 1885. 



On a new method of producing the fringes of interference. By L. R. 



Wilberforce 325 



Some experiments on the dielectric strength of mixtures of gases. By 



C. Olearski 325 



On the mutual action of oscillatory twists in a vibrating medium. Bv 



A. H. Leahy 330 



On the transpiration-stream in cut branches. By F. Darwin and R. W. 



Phillips 330 



February 1, 1886. 



On a fall of temperature resulting from an increase in the supply of 



heat. By Professor Liveing 369 



On the functions inverse to the second elliptic integral. By J. W. L. 



Glaisher 372 



On the movement of solids through ether. By Mr A. H. Leahy . . 374 



On Mr Galton's anthropometric apparatus at present in use in the 



Philosophical Library. By H. Darwin and R. Threlfall . . 374 



