524 



Scott (D. H.) On the Structure and Affinities of Fossil Plants from the Palaeozoic 

 Rocks. IV. The Seed-like Fructification of Lepidocarpon, a Grenus of Lyco- 

 podiaceous Cones from the Carboniferous Formation, 117. 



Searle (G-. F. C.) and Bedford (T. G-.) The Measurement of Magnetic Hysteresis, 

 348. 



Seeds, estimation of vitality of, by electrical method (Waller), 79. 



Selenates of Series R 2 M(Se0 4 ) 2 ,6H 2 0, crystallographical study of (Tutton), 322. 



Sensation, Visual, Studies in (Morgan), 459. 



Seward (A. C.) and Dale (E.) On the Structure and Affinities of Dipteris, with 



Notes on the Greological History of the Dipteridinae, 373. 

 Silicon, spark spectrum of, in silicates (Hartley), 109. 

 Skin currents of Frog (Waller), 480. 

 Smithells (A.) elected, 326 ; admitted, 366. 

 Soil, swelling of, caused by dampness (Darwin), 253. 

 Solar Activity 1833-1900 (Lockyer), 285. 



Steele (R. D.) The Measurement of Ionic Yelocities in Aqueous Solution, and 1 



the Existence of Complex Ions, 358. 

 Strutt (R. J.) On the Conductivity of Gases under the Becquerel Rays, 126. 

 Sun-spots, secular period of (Lockyer), 285. 



Surra disease and Tsetse-fly disease, probable identity of (Rogers), 163. 

 Swithinbarik (Harold) Yirulence of Desiccated Tubercular Sputum, 495 ; Effect 



of Exposure to Liquid Air upon the Vitality and Virluence of the Bacillus 



Tuberculosis, 498. 



Tellurium, preparation in large quantities (Matthey), 161. 

 Temperature, nadir of, and allied problems (Dewar), 360. 

 Temples, G-reek, orientation of (Penrose), 112. 

 Thermometers, gas, of helium, hydrogen, &c. (Dewar), 44. 

 Thomas (M. R. Oldfield) elected, 326 ; admitted, 360. 

 Trout, anatomy of double monstrosities in (Gremmill), 129. 

 Trypanosoma, relation to surra disease (Rogers), 163. 

 Tsetse-fly disease, probable identity with Indian surra (Rogers), 163. 

 Tubercular sputum, virulence of desiccated (Swithinbank), 495. 

 Turner (H. H.) On the Brightness of the Corona of January 22, 1898. Pre- 

 liminary Note, 36. 



Tutton (A. E.) A Comparative Crystallographical Study of the Double Selenates- 

 of the Series R 2 M(Se0 4 ) 2 ,6H 2 0— Salts in which M is Magnesium, 322 



Vanadium, Arc Spectrum of (Lockyer and Baxandall), 189. 



Veley (V. H.) and Manley (J. J.) Some Physical Properties of Nitric Acid 

 Solutions, 128. 



Vision, quantitative relation of stimulus and sensation in (Morgan), 459. 

 Visual phenomena, negative after-images, &c. (Bidwell), 262. 



Walker (Or. W.) On the Application of the Kinetic Theory of Gases to the 

 Electric, Magnetic, and Optical Properties of Diatomic G-ases, 77. 



Waller (A. D.) An Attempt to Estimate the Vitality of Seeds by an Electrical 

 Method, 79 ; On Skin Currents. Part I. The Frog's Skin, 480. 



Warren (E.) A Preliminary Account 'of the Development of the Free-swimming. 

 Nauplius of Leptodora hyalina (Lillj.), 210. 



Watson (William) elected 326 ; admitted, 360. 



Wheat soils, phosphoric acid and potash contents of (Dyer), 11. 



