CONTENTS {continued). 



PAGE 



X. Note on the Existence in the King Crab {Limulus polgphemus) of 

 Stigmata corresponding to the Respiratory Stigmata of the Pulmo- 

 nate Arachnida, and on the Morphological Agreements between 

 Limulus and Scorpio. By E. Rat Lankester, ■ M.A., F.R.S., 

 Jodrell Professor of Zoology in University College, London . . 391 



XI. Effects of Stress on the Thermoelectric Quality of Metals. Parti. 

 By J. A. Ewing, B.Sc, E.R.S.E., Professor of Mechanical Engi- 

 neering in the University of Tokio, Japan ..... 399 



XII. On the Reversal of the Lines of Metallic Vapours. No. YIII. (Iron, 

 Titanium, Chromium, and Aluminium.) By Gr. D. Liyeing, M.A., 

 F.R.S., Professor of Chemistry, and J. Dewar, M.A., E.R.S., 

 J acksonian Professor, University of Cambridge .... 402 



XIII. Note on a Comparison of the Diurnal Ranges of Magnetic Declina- 

 tion at Toronto and Kew. By Baleour Stewart, LL.D., E.R.S., 

 and Wieeiam Dodgson 406 



XIV. On the Absorption of G-ases by Solids. By J. B. Hannay, F.R.S.E., 



E. C.S .407 



XV. On the States of Matter. By J. B. Hannay, F.R.S.E., F.C.S. . 408 



XVI. The Relation of the White Blood Corpuscles to the Coagulation of 

 the Blood. By L. C. Wooldridge, B.Sc. Lond., Physio] ogische 

 Anstalt, Leipzig .......... 413 



XVII. A New Line of Research bearing on the Physiology of Sugar in 



the Animal System. By F. W. Pavy, M.D., F.R.S. . . .418 



XVIII. On the Stresses caused in the Interior of the Earth by the Weight 



of Continents and Mountains. By Gr. H. Darwin, F.R.S. . . 432 



XIX. On the Refraction of Electricity. By Alered Teibe, F.I.C., 



Lecturer on Chemistry in Dulwich College ..... 435 



XX. Note on the Spectrum of Sodium. By Captain W. de W. Abney, 



R.E., F.R.S . . .443 



XXI. Formulae for sn 8u, cn 8u, dn 8u, in terms of sn u. By Ernest H. 



G-eaishee, B.A., Trinity College, Cambridge .... 444 



XXII. On Riccati's Equation and its Transformations, and on some 

 Definite Integrals which satisfy them. By J. W. L. Gteaisher, 

 M.A., F.R.S., Fellow of Trinity College, Cambridge . . . 444 



XXIII. Sur la Surface de l'Onde, efc Theor ernes relatifs aux Lignes de 



Courbure des Surfaces du Second Ordre. Par A. Mannheim . 447 



XXIV. On certain Definite Integrals. No. 9. By W. H. L. Russell, 



F. R.S 450 



XXV. On the Influence of Coal-dust in Colliery Explosions. No. III. By 



W. Gr ALLOW AY 454 



