RECENT ADVANCES IN SCIENCE 549 



Jeffreys, H., On the Relation between Wind and Distribution of Pressure, Proc. 

 Roy. Soc. 1919, 96, A, 233-49. 



Rayleigh, Lord, The Travelling Cyclone, Phil. Mag. (6), 1919, 38, 420-4. 



Jeffreys, H., On Travelling Atmospheric Disturbances, ibid. (6), 1919, 37, 

 1-8. An explanation is suggested for the conspicuousness of the cyclonic 

 type of disturbance, other types being dissipated before they can be observed. 



The following additional papers have been published recently : 



Potential Theory. 



Sen, N. R., On the Potential of Uniform and Heterogeneous Elliptic Cylinders at 



an External Point, Phil. Mag. (6), 1919, 38, 465-79. 

 Prasad, J., On a Peculiarity of the Normal Component of the Attraction due to 



Certain Surface Distributions, ibid. (6), 1918, 36, 475-6. 

 Veronnet, A., Figures ellipso'idales d'equilibre d'un liquide en rotation, variation 



du grand axe, Comptes Rendus, 1919, 169, 328-31. 

 Jeans, J. H., The Configuration of Rotating Compressible Masses, Phil. Trans. 



218, A, 157-210. 

 MacMahon, P. A., and Darling, H. B. C, Contribution to the Theory of 



Attraction when the Force Varies as any Power of the Distance, Proc. Roy. 



Soc. 1 9 19, 95, A, 390. 

 Levy, P., Sur la generalisation de l'equation de Laplace dans le domaine 



fonctionnel, Comptes Rendus, 1919, 168, 752-5. 



Dynamics. 



Galitzin, B., An Apparatus for the Direct Determination of Acceleration, Proc. 



Roy. Soc. 1919, 95, A, 492-507. 

 Auclair and Boyer-Guillon, Sur un accelerographe, Comptes Rendus, 1919, 



169, 24-6. 

 Andrade, J., La pesee d'un frottement pendant le glissement relatif des deux 



solides en contact, ibid. 19 19, 169, 638-9. 

 Southerns, L., The Double Suspension Mirror, Phil. Mag. (6), 1918, 36, 477-86. 

 MORTON, W. B., Note on the Motion of a Simple Pendulum after the String has 



become Slack, ibid. (6), 1919, 37, 280-4. 

 Emch, A., On Closed Curves described by a Spherical Pendulum, Tohoku Math. 



Jourti. 1919, 15, 146-65. 

 Longdon, A. C, On the Irregularities of Motion of the Foucault Pendulum, Phys. 



Rev. (2), 1919, xiii. 241-58. 

 Epstein, P. S., Bemerkungen zur Frage der Quantelung des Kreisels, Phys. Zeit, 



19 19, 20, 289-94. 

 Lorentz, H., Kurze Ableitung der Bewegungsgleichungen des Kreisels, ibid. 



1919, 20, 294-6. 

 Richards, H. C, The Motion of a Rotating Projectile, Phys. Rev. (2), 1919, xiv, 



198-9. 

 ANDOYER, H., Sur le developpement d'une fonction tres generate du rayon 



vecteur et de l'anomalie excentrique dans le mouvement elliptique, Comptes 



Rendus, 191 9, 169, 315-7. 

 Bourget, H., Developpement algebrique de la partie principale de la fonction 



perturbatrice suivant la methode de Cauchy, ibid. 1919, 168, 83-5. 

 Chazy, J., Remarque sur les problemes des deux corps et des trois corps, ibid. 



1919, 168, 81-3. 



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