4-43 



Sorbic acid, a new vegetable acid, ii. 



22. 

 Sound, on the velocity of, ii. 188, 221, 



332, 401. 



and light, experiments respect- 



ing, i. 8. 

 Sounds inaudible by certain ears, on, 



ii. 133. 

 Sounding-board, in Attercliffe church, 



description of, ii. 349. 

 South (J.), observatipns of the apparent 

 distances and positions of 458 double 

 and triple stars, ii. 253 ; on the dis- 

 cordances between the sun's obser- 

 ved and computed right ascensions, 

 ii. 285, with Prof. Airy's remarks on, 

 ii. 305 ; observations of the apparent 

 distances and positions of 380 double 

 and triple stars, ii. 224. 

 Space : on the power of penetrating 

 into by telescopes, i. 5 ; by naked 

 vision, i. 6. 



Specific names, on their necessity to 

 all such functions of simple elements 

 as represent definite physical pro- 

 perties, ii. 299. 

 Spherical surfaces, on the aberration 



of, ii. 126. 

 Spheroid, on the expansion in a series 



of the attraction of a, ii. 162. 

 Spheroids, on Laplace's method for 

 computing the attractions of, i. 413, 

 415. 



Spinal marrow : on the formation of 



the canal in the proteo-saurus for 



the, ii. 128 ; on its influence on the 



action of the heart, ii. 8, 10. 



Spine, on the mechanism of the, ii. 



170. 

 Spleen, its structure and uses, i. 283, 



295. ii. 137. 

 Springs, mineral, of England, discovery 



of bromine in, ii. 402. 

 Squalus acanthius, structure of the, i. 



374. 

 Squalus maximus, anatomical account 



of, i. 329, 332,471. 

 Square roots of negative quantities, on 

 the objections raised against the geo- 

 metrical representation of, ii. 371. 

 Standards of linear measure, on errors 

 arising from the thickness of the bar 

 in which they are traced, ii. 409. 

 Standert (H. C.), description of mal- 

 formation in the heart of an infant, 

 i. 195. 



vStannanea and stannane, i. 426. 

 Stapes, on the physiology of the, i. 188. 

 Star, variable, in Sobieski's Shield, on 



the changes of, i. 180. 

 Starch, sugar from, ii. 105. 

 Stars, catalogue of nebulae and clusters 

 of stars in the southern hemisphere, 

 ii. 334. 



, double, on the changes in the 

 relative situation of, i. 126, 158. 



, double and triple, observations of 



the apparent distances and positions 

 of, ii. 224, 253. 



, fixed : on the declinations of, 



i. 245. ii. 182, 183, 203; north polar 

 distances of, i. 449, 477. ii. 29, 205 ; 

 on the parallax of the, ii. 65, 66, 76, 

 79, 93, 102, 274, 308 ; on the me- 

 thods of constructing a catalogue of, 

 ii. 99 ; investigation of the effects of 

 parallax and aberration of, ii. 151 ; 

 catalogue of, between the zenith of 

 Cape Town and the south pole, ii. 

 222 ; on the annual variations of, 

 ii. 251 ; method of comparing the 

 light of with that of the sun, ii. 355. 

 , on the relative distances of clus- 

 ters of, ii. 100. 



Steam-engines in Cornwall, on the pro- 

 gressive improvements in the effi- 

 ciency of, ii. 393. 



Steel: the best kind of for a compass 

 needle, ii. 141 ; developement of 

 inagnetical properties in by percus- 

 sion, ii. 168, 210 ; on the alloys of, 

 ii. 169 ; hard and soft, on the elasti- 

 city and strength of, ii. 218. 

 Stodart (J.) on the alloys of steel, ii. 



169. 



Stomach : human, on the gastric 

 glands of, and the contraction wliich 

 takes place in that viscus, ii. 79 ; 

 influence of the nerves of the eighth 

 pair on, i. 486 ; of animals, nature 

 of the acid and saline matters usually 

 existing in, ii. 204 ; on its structure 

 in animals, i. 256, 261; of the du- 

 gong, peculiar structure of, ii. 134; 

 of the zarifia, ii. 389. 

 Stone, new mode of performing the 



high operation for the, ii. 131. 

 Stones : containing fixed alkali, me- 

 thod of analysing, i. 196; bitumen 

 in, ii. 202. 



Stony substances said to have fallen 

 on the earth, on, i. 75, 109. 





