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| Kaolin, decomposed granite in the state of, in Cornwall, 125-on the origin of and where found | 126 |
| Kimeridge Coal, Description of | 263 |
| Laumonite, The Count de Bournon on the, 77—Specific characters of, 79-Observations on the crystallization of, 82-General Observations on, 86—Table of the modifications of the primitive crystal of | 90 |
| Lava, different varieties of stratified, in the Island of Madeira, 392-Dykes of, intersecting strata of lava, 394—Columnar, 395 containing carbonate of lime | 398 |
| Lead Mines in the vicinity of Dublin | 270 |
| Limestone Cliffs near Plymouth, description of the, 103—formation of, in Shropshire, 199—varieties of, in the vicinity of Dublin, 272-strata of, on the western side of the Malvern Hills, 306, 309 | |
| Limestone, Transition, on the banks of the Plym | 104 |
| Limestone, schistose, near Launceston | 122 |
| Limestone, Coarse shelly (calcaire grossier) in Hampshire, Dorsetshire, &c. | 258 |
| Limestone, oviform, in Dorsetshire | 262 |
| Lipari Islands, Native Concrete Boracic Acid, from the | 389 |
| MacCulloch, Joan, M.D. Account of Guernsey, and the other Channel Islands | 1 |
| ─────── Notice accompanying a Section of Heligoland | 322 |
| Madeira, Sketch of the Geology of, by the Hon. H. G. Bennett | 391 |
| Melvern hills, on the Mineralogy of, by Mr. Horner | 281 |
| Manganese found in Jersey | 22 |
| Manganese, black oxide of, Mine at Upton Pyne | 101. |
| Manganese, grey ore of, with brown iron-stone and brown iron-ore, in the peninsula of Howth, near Dublin | 273 |
| Marcet, Alexander, M.D. Chemical Account of an Aluminous Chalybeate Spring in the Isle of Wight | 213 |
| Marl Beds in the Cheshire plain | 40 |
| Marl in Hampshire | 255 |
| Meres or deep Pools, characteristic of the old red sandstone formation | 193 |
| Mica Slate of Cornwall | 129 |
