Kingdom.]
173
Class 1.—MINING AND MINERAL PRODUCTS.South Side.—-Areas. S. 1 to S. 27.
Nickel and iron; fusible alloy; tutannia, for type-metal; iron and antimony; iron and zinc (not magnetic),will not rust; spelter solder; silver solder; tinman’s andplumber’s solder.
These specimens display the surface, and where prac-ticable, the fracture of all the useful metals and alloys.Many of the alloys are new combinations, and are valuablein point of utility and economy. Some of the alloys areintended for the small steps of machinery, &c., composedof 16 oz. copper, 8 oz. zinc, 4 oz. lead, \ oz. tm Thisalloy has been used very extensively; it works well underthe file and turning-tool; and its lasting properties aregreat. This is the cheapest metal that will answer formachinery purposes, especially if made from brass turn- 1ings. The alloy made from pig iron and zinc turns andfiles very well, and is adapted for shaft-bearings, parti-cularly for such work as requires exposure to the weather.Portions of this metal have been exposed for severalweeks without any appearance of rust. ^ It is intended asa substitute for brass in many cases, being much cheaper.The magnetic properties of the iron are entirely neutral-ized ; hence, for some purposes, it will be superior to anyother metal or combination. In speculum metals, theproportions of Newton (163 and 164), when cast in a hotchill, will take a more brilliant polish, and retain thebrilliancy longer than any other combination: being castin a hot chill prevents too Sudden contraction, and thebrittleness so often experienced. These ^ cabinets ofmetals and alloys are intended as illustrations for thelecture-table, and for general reference in the manipula-tions of metals.
488 Garland, Thomas, Fairfield, Redruth —Manufacturer,
Impure oxide of arsenic, obtained from tin ores (con-taining arsenical pyrites) by calcination.
Commercial oxide of arsenic, obtained from the fore-going by sublimation in reverberatory furnaces, and after-wards ground to an impalpable powder,
A finer quality of the preceding,
Lump arsenic, obtained from the preceding by sublima-tion in close retorts.
[Arsenic is found native occasionally, but is more fre-quently combined with other metals, of which iron,cobalt, nickel, silver, copper, antimony, and manganeseare the chief. It is very soft but brittle, and volatilizesreadily at a temperature of 365° Fahrenheit. It combineswith oxygen in white arsenic (arsenious acid), and withsulphur in realgar and orpiment. The former substanceis used in medicine, in the manufacture of glass, &c»The sulphurets are valuable pigments, both in dyeingand in the fine arts.—D. T. A,]
489 Lowe, J., 30 Gracechurch Street — Part Proprietor,Copper , from the exhibitors patent works, Penclawdd.
490 Rowlandson, Thomas, 7 Esher Street,Kennington —Patentee,
Bluestone — a compound of bisulpliuret of iron, sul-phuret of lead (galena), bisulphuret of copper, sulphuretot zinc (blackjack), &c,, some silver and gold, obtained atthe Isle of Anglesey: also at the Yale of Ovoca, Wicklow ,Ireland .
The zinc salts can be converted into chloride of zincsulphate of soda; these can be employed in a varietyot forms for preserving animal and vegetable substances,deodorizing, &c.
Specimens illustrating the processes by which thesulphuret is converted into sulphate of zinc, which isWashed out, and leaves the lead, gold, and silver tobe extracted in the ordinary mode by smelting.
Specimens of ores and products from the Cvvm-eisianGold Mine, Merionethshire.
[The existence of gold in many of the rocks of Wales has been long known. There is every reason for believingthat the Romans worked the mine at Gogofan, near Pump-sant, Caermarthenshire. This is not only proved by theremains of mine workings, which have been lately ex-amined by the mining geologist to the Geological Survey,but by the gold ornaments which have been found in theYale of Cothy, near this spot, which are evidently ofRoman workmanship. The mine at Cwm-eisian yieldedgold disseminated through the quartz, but not being suffi-ciently remunerative, the works have been abandoned.—R. H.]
491 Harrison, J., Bakervale , Derbyshire — Producer.
Lead ore, from Mogshaw mine, Bakervale.
492 Rowe, Richard, Laxey Glen, Douglas, Isle of Man —Joint Proprietor.
Silver lead ore, and blende ore, being the produce ofthe LaXey Mifies, in Laxey Glen, parish of Lonan, Isle ofMan .
[Mines Were worked at an eai’ly period in the Isle ofMan , but the neighbourhood of Laxey first attractedattention at the commencement of the present century.Ill 1811, only three hands were employed; in 1848, therewere at least 300 in the mine. The mine is situated abouta mile and a half from the sea, up the Laxey Valley,where an adit is driven 400 fathoms into the heart of themountain; from this adit the shaft has been sunk about130 fathoms. The returns of lead ore for the last fiveyears have been as follows:—
In addition to this, about 200 tons of the sulphuret ofzinc are annually raised.—R. H.]
492a Coates, W.—Producer.
Specimens of lead ore from Tullyratty Mine, Strang-ford, Ireland , the property of Lord de Ros.
493 Gumming, J. G., Isle of Man — Producer.
Argentiferous galena, from the Foxdale Mines, con-taining 36 ounces of silver to the ton.
[This lead ore is procured from a granite vein, runningN.N.W. and S.S.E., nearly magnetic; it improves inquality, and increases in quantity downward, which is anunusual occurrence. It is now being worked at 50fathoms from the surface.—R» H,]
494 Byers, Joshua, Stockton-on-Tees, Durham —Producer and Manufacturer.
Lead ore from Grasshill Mine, Teesdale.
Silver and litharge from the same mine.
Refined, common, and slag lead.
Thin sheet-lead and lead pipe.
495 Burr, Thomas, William, & George, Shrewsbury—Producers and Manufacturers.
Mineral specimen, raised at the Snailbeach lead mines,Shrewsbury, weighing 12 cwt., containing cubes of leadand zinc ore, in conjunction with carbonate and sulphateof barytes.
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[Official Illustrated Catalogue.]
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