CXXX1V INDEX. 



contained in granite, Note 249. On the effects produced on certain argilla- 

 ceous schists by the contact of granite, p. 249. On different minerals and 

 their mode of formation, composition, &c. Notes 257, 258, 262, 268, 294. 



Ross (Captain Sir James Clark), soundings with 4600 fathoms of line, p. 150. 

 New forms of microscopic animals from the Antarctic Polar Seas, p. 341 

 Magnetic observations near the centre of the highest isodynamic oval, Notes 

 158 (Editor) and 160. Determination of the lines of equal declination, equal 

 inclination, and equal intensity, over three-fourths of the accessible portion 

 of the high southern latitudes, Note 166 (Editor). 



Rossel (Admiral), observations of magnetic intensity. Their bearing and date of 

 publication discussed, Note 159. 



Rothmann, first recorded notice of the zodiacal light, mistaking it, however, for 

 a phenomenon of twilight, Note 99. 



Royle (Forbes), snow-line on the two declivities of the Himalaya, Note 403. 



Rozier, observed a steady luminous appearance in clouds, p. 188. 



Rumker, Encke's comet seen with the naked eye in New Holland in 1822, p. 98. 



Ruppell contradicts the existence of active volcanoes in Kordofan, Note 237. 



Russegger (and Berton), barometric measurements shewing a great depression of 

 the Dead Sea and the valley of the Jordan below the level of the Mediterranean, 

 Note 124, 353. 



Sabine (Edward), on the western movement of the intersection of the line of no 

 dip with the geographical equator in the Atlantic from 1825 to 1837, p. 173 ; 

 Note 156. On the particular importance of the isodynamic lines to the theory 

 of terrestrial magnetism, p. 174; Note 158. On the variations of the mag- 

 netic intensity over the surface of the globe, p. 174, 175. On the highest 

 intensity on the globe, Note 160. Magnetic intensity at Melville Island near 

 the magnetic pole compared with New York, p. 175. Determination of ellip- 

 ticity by pendulum experiments, Note 131. Increased intensity of gravitation 

 in volcanic islands, Note 132 (Editor's addition). Magnetic disturbances, 

 Note 143. Observes the current of the river Amazon 300 miles from the 

 mouth of the river, Note 373 (Editor's addition). Diurnal variation of the 

 pressure of the dry air at Bombay, Note 382 (Editor's addition). See Editor. 



Sagra (Ramon de la), mean annual quantity of rain at the Havannah, p. 331. 



Salses, or mud volcanoes, p. 211213. 



Santorin, island of, affords " a type of islands of elevation," p. 230 ; Note 231. 



Sargasso Sea, or portion of the ocean covered with the gulf weed, p. 301. 



Satellites, revolving round the primary planets of the solar system, general ac- 

 count, p. 8690. Of the Earth, see Moon. Of Jupiter, p. 8789. Of 

 Saturn, p. 8790, 116. Of Uranus, p. 20, 8790. 



Saturn, see Planets. 



Saussure, measurements of the crater of Vesuvius, p. 221 ; Note 219. Found 

 traces of ammoniacal vapours in the atmosphere, p. 305. On glaciers, p. 328. 

 Hygrometric observations at heights, p. 332. Diurnal variation of atmo- 

 spheric electricity, 334. 



Bchayer, microscopic animals in ocean water, p. 342. 



Schelling, quotation from his Giordano Bruno, p. 65 ; Note 30. 



Scheuchzer's fossil salamander once supposed to be a human skeleton, p. 263. 



Schiller, quotation from, p. 15; Note 9. 



Schleiden, on the germs of organisation and development of vegetable cells, p. 

 349 ; Notes 431, 432. 



