RECENT ADVANCES IN SCIENCE 17 



R. F. GUYTHER, A Doctrine of Material Stresses, Phil. Mag. vi. 35, 1918, 490-2. 

 D. N. Mallick, Elastic Solids under Body Forces, Phil. Mag. vi. 35, 1918, 



321-6. 

 T. H. Gronwall, Elastic Stresses in an Infinite Solid with a Spherical Cavity, 



Ann. of Math. ii. 19, 1918, 295-6. 

 K. Uller, Elastische Oberflachen-planwellen, Ann. de Phys. 56, 1918, 463-96, in 



which the author concludes that there are three types of elastic surface waves: 



the pure shear wave, the pure expansion wave but so damped that the effect 



is only local, and a combination of both. 

 Dynamics. J. Arnovlievitch, Sur les theoremes de projection et des moments 



des quantitds de mouvement, Nouv. Ann. de Math. 1918, 139-41. 

 F. W. Reed, On Integral Invariants, Amer. Journ. of Math. xl. 191 8, 97-107. 



C. Michel, Mouvements plans dans lesquels le tangente a une vitesse angulaire 



constante, Nouv. Ann. de Math. 1917. 

 K. Ogura, Determination of Central Forces acting on a Particle whose Equations 

 of Motion Possess an Integral Quadratic in the Velocities, Tohoku Math. 

 Journ. li, 191 8, 155-60. 



D. Buchanan, Orbits Asymptotic to an Isosceles Triangle Solution of the 

 Problem of Three Bodies, Proc. Lond. Math. Soc. xvii. 1918, 54-74. 



E. H. Barton and H. M. Browning, Variably Coupled Vibrations, iii., Phil. 



Mag. vi. 35, 1918, 36-47. 



E. H. Barton and H. M. Browning, Forced Vibrations Experimentally Illus- 

 trated, Phil. Mag. vi. 36, 1918, 169-78. 



A. Emch, On Closed Curves described by a Spherical Pendulum, Proc. Nat. 

 Acad, of Sci. U.S.A. 1918, 218-21. 



E. L. Rees, Concerning the Motion of a Rigid Body, Amer. Math. Monthly, 



1918, 126-7. 



F. Reiche, Zur Quantelung des asymmetrischen Kreisels, Phys. Zeit. 1918, 



394-9- 

 E. E. Tournay Hinde, On a New Gyroscopic Phenomenon, Proc. Roy. Soc. 94, 



A, 1918, 218-22. 

 P. Straneo, Sur l'extension des principes de Phomoge'neite' et de la similitude 



et sur une remarquable relation entre les constantes universelles d'une theorie, 



Comptes Rendus, 167, 191 8, 360-3. 



G. Tiercy, Sur la fonction de resistance de la balistique, L Enseignement Math. 



1917, 309-13. 

 A. N. Whitehead, Graphical Solution of High Angle Fire, Proc. Roy. Soc. 94, 



A, 1918, 301-7. 

 M. Doyere, Remarques sur la resistance a la marche de navires g£om£triquement 



semblables, Comptes Rendus, 166, 1918, 384-7. 

 C. Cailler, Sur les trajectories d'une mobile soumise a une force centrale et 



a une resistance de milieu, L Enseignement Math. xx. 1918, 93-6. 

 S. BRODETSKY, The Stability of the Parachute, Tohoku Math. Journ. 14, 1918, 



116-23. 

 Mechanics of Fluids. J. G. Leathem, On Two-dimensional Fluid Motion, with 



Free Stream Lines, past an Obstacle of Curved Outline, Proc. Roy. Irish 



Acad, xxxiv. A 2, 1918, 11-39. 

 T. Boussinesq, several papers on the motion of fluids and semi-fluids, Comptes 



Rendus, 166, 191 8, passim, 

 T. R. Pannell, The Wind Channel : Its Design and Use, Aer. Journ. xxii. 1918, 



311-40. 

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