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INDEX.
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| Quartz Rock of the District of Appin | 473 |
| ───────────────── Arisaig | 473 |
| ─────── of the Island of Sky | 473 |
| ─────── of Tyndrum, containing galena | 479 |
| ─────── Schistose, in the group of mountains called Ben-na-Vear, Argylleshire | 475 |
| Reading, Strata at | 198 |
| Rock-Salt, the Brine Springs at Droitwich derived from | 98 |
| Rona, Island of, Mineralogical Observations on the | 391 |
| Rotherhithe, Strata at | 197 |
| Rum, Island ol, Mineralogical Observations on the | 401 |
| Rutile, found near Killin | 437 |
| Ryegate Fire Stone, Description of the | 166 |
| St. David's, On the Mineralogy of the neighbourhood of | 79 |
| Sand, White, of Alum Bay | 185 |
| ────Green, over the Chalk | 187 |
| ──── Vitrified, supposed to be the effect of lightning | 531 |
| Sandstone, Old Red, the Droitwich Brine Springs occur in the | 95 |
| ──────────── cuts off the Coal Measures at Bradford | 283 |
| ─────── under the Chalk in the South of England | 166 |
| ─────── over the Chalk in the South of England | 227 |
| Sappare, found at Boharm | 430 |
| Schihallien, Mountain of, Rocks composing the | 466 |
| Septaria in the London Clay | 187 |
| Sheppey, Isle of, Description of the | 192 |
| Shiant Isles, Description of the | 394 |
| Silica, on the sublimation of | 275 |
| ────Appearances of a partial solution of, on the Surface of some Rocks | 392 |
| Silicified Wood, in the Island of Egg | 408 |
| Sky, Island of, Quartz Rock in the | 473 |
| Slaty Rock, peculiar kind of, near St. David's | 79—85 |
| South Downs, Hills composing the | 171 |
| Springs, Temperature of, in the Isle of Man | 60 |
| Staffa, Remarks on | 501 |
