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Page 



SOME TEMPERATURE REFRACTION COEFFICIENTS OF OPTICAL 



' GLASS. By Lieut.-Col. J. W. Gifford 319 



THE EFFECTS OF DIFFERENT GASES ON THE ELECTRON EMISSION 



FROM GLOWING SOLIDS. By Frank Horton, Sc.D 322 



ON THE CORPUSCULAR RADIATION LIBERATED IN VAPOURS BY 



HOMOGENEOUS X-RADIATION. By H. Moore, B.Sc, A.R.C.S 337 



DEEP WATER WAVES, PROGRESSIVE OR STATIONARY, TO THE 



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