Kingdom.]
Class 1.—MINING AND MINERAL PRODUCTS.South Side—Areas S. 1 to S. 27.
137
White lias, from Beer Croweombe, and from Twerton,Somerset . Gypsum, from the former place.
New red sandstone, from Bishop’s Lydiard, near Taun-ton, Somerset .
Millstone grit, for paving, &e., from the Pennant quar-ries, Hanham, near Bath.
Carboniferous limestone, from St. Vincent’s rocks,Clifton; from the Breakwater quarries, Plymouth, fromNewton-Abbott; and from Kingskerswell, near Torquay ,Devon .
Granite, from Dartmoor, Devon, used for Government works, Stonehou'se.
Marlstone or middle lias, from near Ilminster, Somerset .
Mountain limestone from the Mendip Hills, nearShepton Mallett, Somerset .
[Many of the stones referred to in the above list are ofconsiderable value and interest. The whetstones firstalluded to are manufactured from hard sandy concretions,found in the lower cretaceous rocks on the west partof the Blackdown hills, and quarried from galleries drivenas much as 300 yards into the hill side. These concre-tions vary from 6 to 18 inches in diameter, and form abed about 4 feet thick, available for scythe-stones. Thebeds above and below are employed for building pur-poses.
The inferior oolites, worked at Crewkerne as buildingstones, are not specially remarkable for excellence, butthe Hamdon-hill stone is durable and valuable. ThePennant grit is a rock much employed for building andengineering purposes, and belongs to the coal measures.
The granite of Stoneliouse and Dartmoor is a valuableand durable material.—D. T. A.]
155-
Slab of green Connemara marble from the D’Arcyestate.
15G-
Mountain limestone from Weardale.
157 Gumming, Rev. Joseph George, Castletown,
Pale marble (carboniferous limestone), from Scarlett,Isle of Man . Exported from Castletown. Castle Ruslien(900 years old), King William’s College, St. Thomas’schurch, Douglas, and Castletown pier, are built from thesequarries. It is durable, and easily raised.
158 Champerxowne, H. Partington House, Totness —
Proprietor.
Cubes of polished Devonshire marbles.
159 Tennant, James, 149, Strand —Mineralogist.
The maps of the Ordnance Survey , geologically coloured
by the officers of the Geological Survey of the UnitedKingdom .
160 Freeman, William & John, Millbank Street,Westminster —Producers.
Several varieties of material used for constructions,namely:—
Granites from Lamorna, near Penzance ; from Con-stantine, nearHelston; from Carnsew, Mabe parish, andPolkanago, Stithian’s parish, near Penryn; from Zennor,near St. Ives; and from Rosemorran, Gulval, Cornwall ,hoggintor granite, county Devon ; Aberdeen granite, and1 eterhead granite, from Stirling Hill quarries, Aberdeen-shire; Dalkey or Dunleary granite, county Dublin; Ire-land, and Guernsey and Herm granite used for macadam-ising roads. Polyphant stone from Lewannick, nearLaunceston .
Limestones.—Purbeck marble, from Swanage, Dorset ;the top vein in the quarry, used anciently in churchesand cathedrals. Purbeck stone, called Laning vein, the
second stratum from the top, used chiefly for doorsteps and street kerbs; freestone, third vein, used chieflyfor building; stone, from Down’s Vein, fourth from the topof the quarry, used for footway paving; stone, called fea-ther, fifth vein, used in church building; stone, five bedand cap used for carriage-way paving and building pur-poses; Portland. Portland stone, from West Cliff andfrom Bill quarries; from the Way croft quarries; from theTrade quarry, and from the Vera Street quarry, all in theisle of Portland. Portland roach, the upper part of theregular stone beds ; the lowest bed, used for troughs,sinks, &c. Bath stone, from the Farleigh Down quarries;from the Box quarries, and from Coombe Down quarries.Limestone , from Hooe lake, Plyinstoclc; used for agri-cultural purposes, for footway pavements, and building.Caen stone, from the quarries of M. Jobert.
Magnesian limestone, from the estate • of the MissesGascoigne; Huddlestone stone, near Sherburne, Yorkshire .
Sandstones.—Darley Dale stone, from Stancliff quarry,near Bakewell, Derbyshire ; Cromwell bottom stone, fromthe estate of Samuel Freeman , Esq., Southowram, nearHalifax, Yorkshire . Bradford stone, from the quarries atHeaton. Potter Newton stone, and Gipton wood stone,from the neighbourhood of Leeds . Bramley Fall stone,fromMeanwood quarries, near Leeds ; and from Horsforthquarries, near Leeds . Gazby stone, from quarries nearBradford.
Kentish rag, from the quarries of Mr. Bousted and Mr.Seager, near Maidstone .
Fire-stone, from the quarries of Mr. Stedall, Godstone,Surrey .
Slates and Schists.—Caithness slabs, used very exten-sively for paving.
Valentia slate stone, from the island of Valentia, Kerry,Ireland : the slate is non-absorbent; experiments madeby Messrs. Bramah showed that inch cubes requirednearly six tons to crush them.
Marble.—Green, and black marble, from the estateof Mr. Martin, county Galway, Ireland .
[Most of the materials commonly used in constructionin London are illustrated in the above collection. TheCornish granites and the Portland stones may, however, boselected as requiring notice here. Of the former, thoseshipped from Penryn are the best known; but the quantityannually exported varies very greatly, and the qualitiesare also variable. The different kinds exhibited will givesome idea of their appearance. The Portland stone is wellknown, and very excellent, but costly, and rather heavy;it contains 9 5 per cent, carbonate of lime, 1 silica, and 1 car-bonate of magnesia: specific gravity = 2T45, and cohesivepower moderate. The upper beds above the freestone arethe top-cap, shill-cap, and roach, the latter forming a goodstone; the next bed is the best or top-bed, from 3 to S ft.thick, and this is succeeded by the middle or curf-bed,and an inferior bottom bed. The position of the Portlandstone is in the upper part of the upper oolites.—D. T. A.]
161 Hutchison, John, Monyray, near Peterhead —Proprietor.
Bust and pedestal in blue Peterhead granite.
162 Nicholls, John, Trehenning, St. Colomb —Proprietor.
Block of porphyry or elvan-stone, raised near Newquay ,Cornwall ; it is said to resist the action of the weather.
163 Local Committee, Falmouth and PenrynProducer.
Stone, from Porkellis, Wendron, suitable for building,roads, chimney-pieces, or tables. Stone from Forest-gate ,Stithians; and from Church Town, about two miles dis-tant; from Mylor, near Penryn; and from Wendron.
Stone, for road-making, extensively used on the Truro ,Penryn, and Redruth trusts, from Pasko and Treluswell