INDEX. 
Saline matters in stomachs of animals , Dr. Prout on, 45. 
Scoresby, W. jun. Esq. on the developement of magnetical 
properties in iron and steel by percussion, 197. 
Scylla gun-brig, distribution of magnetism in, 310, 315. 
Seal , Sir E. Home on, 233— structure of its funis and placenta, 
237. 
Sea watery its action on copper, 151 — not owing to impurities in 
the copper, 151, but to the water containing air, 242 — 245 — 
mode of rendering it fresh by the action of iron and copper, 
24 6 ; see coppery preservation. 
Semi- decussation of the optic nerves, Wollaston on, 222. 
Serrulas, M., gyration of potassiuretted bismuth on the surface 
of mercury under water, and other phasnomena observed by, 
192 — his theory, 194 — called in question, 192 — phenomena 
otherwise explained, 195. 
Sheathingy copper, Sir H. Davy on the corrosion of, 151. 
Shells, fossil. Mr. Dillwyn on the relative ages of, 413 — in the 
transition lime, lias, and other strata, 413— co-existence of 
Lamarck’s two orders of simple bivalves since the deposition 
of transition rocks, 413 — all referable to existing orders in 
the secondary beds above lias, 414 — all tertiary shells to ex- 
isting genera, 415. 
Ships , Sir H. Davy on the corrosion of their copper, and the 
means of its prevention, 151, 242. 
of war, Mr. Harvey on the distribution of magnetism in, 
310. 
Silver, in alloy with mercury, devoid of electro-mechanical 
influence, 184. 
Snails, their eyes not situated at the ends of their horns, 4 — 
microscopic drawings of their horns by Bauer, Plate I. — 
brains of, ibid. 
Snipe caught in the Atlantic several hundred miles from land, 
13. 
Sodium, a 16’OOOOOth part of it in alloy with mercury rendered 
sensible by its electro-mechanical effect, 181. 
Solstices, summer and winter, Dr. Brinkley’s remarks on, 61. 
Songs of birds, 35. 
Sound, velocity of, experiments on, 424 — altered by wind, 425 — 
stations selected for measuring, 427 — results, when reciprocal 
observations were made, 449 — ditto when not, 452, 454 — 
table of values assigned to by different experimenters, 456. 
