142
Class 1.—MINING- AND MINERAL PRODUCTS.South Side—Areas S. 1 to S. 27.
TUnITED
from the expansion and contraction of the material,whilst lapped and bonded slating adapts itself to move-ment from changes of temperature or otherwise, withoutany derangement that can lead to failure.—W. H.]
211 Breadalbane, Marquis of, Taymouth , Aberfeldy,Perth —Producer.
Slates from the quarries of Easdale, &c., in Argyll-shire.
[The Easdale and other slate quarries of Argyllshirewhich have been worked for upwards of three centuries,employ about 200 men and boys, and export about10,000,000 of slates annually, in about 300 vessels. Theslates are not obtained generally in very large slabs, butmost of the quarries supply a fair proportion of the largerkinds, used for roofing, and measuring 2 feet by 12inches (Duchesses). They are worked in Easdale, Seil,and other small islands of clay slate, a little south ofOban , and near the large island of Jura. The quarriesare of various dimensions; that of Ellenabeich being 300feet long, 100 feet deep, and 150 feet broad, the qualityimproving in the depth. The other quarries are smaller;but those of Easdale are very valuable, and the qualityexcellent. The stratification of the beds of slate rockss very much disturbed; but the cleavage is invariable,running N.E. and S.W., and dipping 50°.—D. T. A.]
212 Limerick. Local Committee —Producer.
Roofing slates. These slates are from the ImperialCompany’s quarries near Killaloe; and, from their greatdurability, they have been adopted for use by the Boardof Ordnance in Ireland .
213 George, J., 4-3 Edgware Road —Inventor ,Patentee, and Manufacturer.
Model of a dwelling-house; a method of building withwrought iron and slate slabs, glass, and other materials,intended to secure stability, durability, and freedomfrom damp and vermin, to save space, and improve tem-perature and ventilation.
Slate manger, with double swivel, to prevent crib-biting.
Fencing in slate and iron.
214 Old Delabole Slate Company (by Jas. Carter),Camelford —Proprietors.
Specimen of Davey’s patent ridge slate.
Slate slab, used for flooring, landings, cisterns, &c.
Roofing slates.
[The magnificent quarries of Delabole have been openedfor at least three centuries, and have supplied a largequantity of excellent slate. They are worked in the Devo-nian slates, near Tintagel, where they are chiefly shipped.The quality is good, combining lightness with strength,and resisting exposure perfectly.
This slate is used not only for roofing, but also in largeslabs for various purposes.—D. T. A.]
217 Cadell, Henry, Dalkeith , Scotland —Producer.
Coal from Dalkeith Colliery, as a specimen of thegeneral coal-field of Midlothian, with section showing thestrata in the coal-field at a depth of 523 fathoms.
[ The Midlothian coal - field is not very distinctlybounded, but contains some kinds of coal much esteemedfor household use. It is estimated that the district con-tains in all, 24 distinct seams, having a total thickness of94 feet of coal.—D. T. A.]
218 Pennock, Tigar, & Co., Grove Hill Works,Beverley , and Hall —Manufacturers.
Stucco paint to be used in oil or water. Beverley Cliffstone, or pure Paris white. Sulphate of barytes fromYorkshire stone. Prepared Yorkshire carbonate ofbarytes. Beverley Cliff-stone, or carbonate of lime.Yorkshire sulphate of barytes.
219 Hunter, L.—Producer.
Model of a coal mine.
220 Langdale, David, Edinburgh —Mining Engineer.
. Six sections of the Scotch coal field, from the upperred sandstone, to the carboniferous limestone, with spe-cimens of the coals and ironstones of Fifeshire andAyrshire.
221 Bituminous Shale Company, 145 Upper ThamesStreet , and Wareham 1 Dorset —Manufacturer andProducer.
Specimen of bituminous shale, known as the Kim-meridge coal, obtained from the cliffs at Kimmeridge, inthe isle of Purbeck, in the county of Dorset . The quarrieswere opened in August, 1849. It is a combination ofbitumen with clay, and from it are obtained, by dis-tillation, volatile mineral oil, grease, asphaltum, andmanure—specimens of each of which are exhibited.
[Bituminous schists or shale are not confined to anypeculiar geological or topographical limits, and are pro-bably, in most cases, the result of the decomposition oflarge quantities of animal remains.
The Kimmeridge coal is of high specific gravity (1*319),of dark-brown colour, and without lustre; it effervescesslightly with acids, and burns readily with a yellowish,rather smoky, and heavy flame. It is a very local de-posit.—D. T. A.]
222 Cahill, M., Ballyconra House , County Kilkenny ,Ireland —Producer.
Peat charcoal, for deodorizing, mixing with manure,smelting, &c.; manufactured in Urlingford Bog, countyKilkenny.
223 Turner, Samuel, Orchard Place, East India Docks —Manufacturer.
Coal, and products of its distillation.
Products from caoutchouc and from wood.
[A number of highly remarkable and peculiar sub-stances arise from the distillation of coal, caoutchouc,and wood. Coal yields, in addition to illuminativegaseous products, various volatile oils, tar, ammonia inseveral forms, and a complex number of singular chemicalsubstances in a state of vapour, or fluid. Caoutchouc yields a volatile oil in which it is itself soluble, and islargely distilled for the sake of this product, which isused in caoutchouc solutions and varnishes. Wood yields an inflammable fluid called wood spirit, and animpure acetic acid, and tar.—R. E.]
224 Azulay, Bondy, Rotherhithe —Producer.
Patent artificial fuel, made of coal dust by pressure,without the admixture of any other substance.
Coal-dust prepared for pressing.
Charcoal made of refuse tan, by extracting pyroligneousacid, tar, &c., from refuse matters.
[The immense compression obtained by the hydraulicpress, has been employed in the arts for producing cohe-sion between loose particles of various substances. In thepresent instance, the same force is used to unite the sepa-rate particles of coal dust into a solid mass. A blockof great density is the result of the pressure.—R. E.]