518 



Shells in the Arctic Seas, and of 

 Tertiary Plants in Greenland, 301. 



Sea Snake (supposed), 208. 



Sea Weeds (edible), experiments on, 

 363. 



Secchi's Statical Barometer, 480. 



Seller (Dr). On Atmospheric Man- 

 oscopy, or on the direct determina- 

 tion of the height of a given bulk 

 of air with reference to JNIeteorolo- 

 gical Phenomena in general, and 

 to the Etiology of Epidemic Dis- 

 eases, 368. 



Simpson (Professor J. Y.) Notice of 

 a Roman Practitioner's Medicine 

 Stamp, found near Tranent, 9. 



. History of an Auencephalic 



Child, 482. 



Smith (James). Recent observations 

 on the direction of the Striae on 

 Rocks and Boulders, 121. 



on the supposed occurrence of 



Works of Art in the older Deposits, 

 158. 



Smyth (C. Piazzi). Astronomical 

 Notices, 13. 



Account of Experiments on 



the Thermotic Effect of the Com- 

 pression of Air, vfith some practi- 

 cal applications, 28. 



on the Total Solar Eclipse of 



28th July 1851, as seen on the west 



coast of Norway, 78. 

 on the nature of the Red 



Prominences observed during a 



Total Solar Eclipse, 79. 

 on the place of the Poles of 



the Atmosphere, 101. 



on some improvements in the 



instruments of Nautical Astronomy, 

 114. 



on a simplification of the in- 

 struments employed in Geographi- 

 cal Astronomy, 161. 



Notice of recent measurements 



of the Ring of Saturn, 192. 



on the Physical Appearance 



of the Comet 3 of 1853, 207. 



on the Stability of the Instru- 



ments of the Royal Observatory, 



229. 

 Notice of the completion of 



the Time-Ball Apparatus, 238. 

 Note on the extent of our 



knowledge respecting the Moon's 



Surface, 274. 

 Account of experiments to as- 

 certain the amount of Professor W. 



Thomson's " Solar Refraction," 302. 

 on a case of Lateral Refrac- 



tion in the Island of Teneriffe, 

 487. 

 Solar Light, 355. 

 Solar Refraction, 302. 

 Solar System, mechanical energies of, 

 241. 



Sorby (Henry Clifton), P.G.S. On 

 the Physical Geography of the Old 

 Red Sandstone Sea of the Central 

 District of Scotland, 334. 



Sources available to Man for the pro- 

 duction of Mechanical Effect, 112. 



Spinal Cord, on the functions of, 470. 



Spleen and other Lymphatic Glands, 

 on the function of, as originators of 

 the Corpuscular Constituents of the 

 Blood, 107. 



" Standing Stones," 272. 



Stark (Dr James). Experiments on 

 the Blood, showing the effect of a 

 few therapeutic agents on that fluid 

 in a state of health and of disease, 

 282. 



Stars, revision of the British Associa- 

 tion Catalogue of, 279. 



Steam Engines, single-acting expan- 

 sive, 60. 



Stereoscope, principles of, 455. 



Stevenson (Alan), LL.B. Biographi- 

 cal Notice of the late Robert Ste- 

 venson, 30. 



Stewart (Balfour) on a Property of 

 Numbers, 390. 



on certain laws observed in 



the mutual action of Sulphuric Acid 

 and Water, 482. 



Stigmaria, remarks on, 316. 



Stirling (J. D. Morries), on iron and 

 its Alloys, 43, 46. 



Stokes (Prof.) on the Absolute In- 

 tensity of Interfering Light, 98. 



Strachur, Moraines in, 279. 



Stratified Traps of the neighbourhood 

 of Edinburgh, 268. 



Striae on Rocks and Boulders, direc- 

 tion of, 121. 



Structure of the more disturbed 

 zones of the Earth's Crust, 387. 



Strychnine, 247. 



Stuart, (.John). Note on a method of 

 obtaining very rapid Photographs, 

 116. 



Sunlight, on the mechanical value of 

 a cubic mile of, 253. 



Superposition, 296. 



Swan (William) on the Total Eclipse 

 of the Sun on 28th July 1851, ob- 

 served at Goteborg ; with a descrip- 

 tion of a new Position Micrometer, 

 73. 



