198 



INDEX H. 



of the North American and British pa- 

 laeozoic strata, 175. 



" Rolled Stones," on the time required 

 for the formation of, 69. 



Romans, on some antiques found at Ciren- 

 cester as evidence of the domestic 

 manners of the, 108. 



Rotation, on an instrument to illustrate 

 Poinsot's theory of, 27. 



Roth (Dr. M.), aphoristic notes on sanitary 

 statistics of workhouses and charitable 

 institutions, 149. 



Rosewood tree, on an abnormal growth 

 in a, 90. 



Royal Agricultural College, Cirencester, 

 notes on experiments in the Botanical 

 Garden of the, 83. 



Rumsey (H. W.), on the territorial dis- 

 tribution of the population, for purposes 

 of sanitary inquiry and social economy, 

 151. 



Saliferous deposits, on the origin of, 75. 

 Salter (J. W.), on the great Pterygotus 

 (Seraphim) of Scotland, and other 

 species, 75 ; on some new palaeozoic 

 star-fishes, compared with living forms, 

 76. 



Salts, on the, in the Cheltenham and 

 other mineral waters, 50. 



Samuelson (J.) on the development of in- 

 fusorial animalcules, 98. 



Scarbcrough, on barometrical and ther- 

 mcmetrical observations at, 49. 



Scelidotherium leptocephalum from La 

 Plata, on the, 73. 



Schools, reformatory, on the position of, 

 in reference to the state, 1.34. 



Scotland, on some new fossils from the 

 ancient sedimentary rocks of, 65 ; on 

 the great Pterygotus of, 75 ; on the 

 money-rate of wages of labour in the 

 west of, 155. 



Screw, experiments to determine the re- 

 sistance of a, when revolving in water 

 at different depths and velocities, 169. 



Scully (Vincent) on the population of 

 Ireland at different intervals, from 1603 

 to 1856, with causes for periodical in- 

 crease or decrease, 142. 



Sea-weeds, notice of the natural printing 

 of, on the rocks in the vicinity of Strom- 

 ness, 90. 



Sewers, on the alkaline emanations from, 

 57. 



Ships, on the application of corrugated 

 metal to, 162. 



Ship-canal, explorations through the 

 valley of the Atrato,to the Pacific in 

 search 'of a route for a, 162. 



Ship-communicator, on a new plan for a, 



164. 

 Sibbald (Dr.) on a new plan for a ship 



communicator, 164. 

 Silver, on the present export of, in the 



East, 161. 

 Sisco (M.), on a new railway break in- 

 vented by, 162. 

 Slavery, on the connexion between, in 

 the United States of America and the 

 cotton manufacture in the United King- 

 dom, 137. 

 Smith (W.) on improved mechanical 

 means for the extraction of oil, and the 

 economical manufacture of manures 

 from fish and fishy matter, 164, 

 Smith's Sound, Dr. Kane on his expedi- 

 tion up, in search of Sir John Franklin, 

 113. 

 Smoke, on the corrosive action of, on 



building stones, 58. 

 Smyth (Prof. Piazzi) on the constancy 



of solar radiation, 28. 

 Solar radiation, on the constancy of, 28. 

 Solutions, on some dichromatic phaeno- 

 mena among, and the means of repre- 

 senting them, 10. 

 Sorby (H.C.) on the magnesian limestone 

 having been formed by the alteration 

 of an ordinary calcareousdeposit,77; de- 

 scription of a working model toillustrate 

 the formation of " drift bedding " (a 

 kind of false stratification), 77 ; on the 

 microscopical structure of mica-schist, 

 78. 

 Species, on the variation of, 101. 

 Specula for reflecting telescopes and lenses, 

 working model of a machine for polish- 

 ing, 24. 

 Spratt (Captain) on the route between 



Kustenjee and the Danube, 119. 

 Squares, on the law of, — is it applicable or 

 not to the transmission of signals in 

 submarine circuits?, 21. 

 Staffordshire, North, on a remarkable 



hail-storm in, 39. 

 Stanley (Lord), opening address by, pre- 

 sident of the statistical section, 122. 

 Star-fishes, on some new palaeozoic, com- 

 pared with living forms, 76. 

 Statistics, 122. 



Steel, on a new process for making and 

 melting, 59; on the manufacture of, 

 without fuel, 162. 

 Stereognathus ooliticus from the Stones- 

 field slate, on, 73. 

 Stereoscopic images, on various phaeno- 

 mena of refraction through semi-lenses 

 producing anomalies in the illusion ofj 



