Kingdom.]
193
Class 2. —CHEMICAL AND PHARMACEUTICAL PRODUCTS.South Gallery.
Whites. —Oxide of zinc, Cremnitz white, flake white,enamel white, satin white, Paris white, barytes (sulphateand carbonate), &c.
L ea( is.—Red, orange, grey, black, white (carbonate).White lead (oxi-chloride); a new invention, patented byH. L. Pattinson, Esq., of Newcastle-upon-Tyne .
Paints ground in oil, of every colour and variety ofshade. Zinc white paint.—Unaffected by sulphurousgases, employed for a delicate dead white oil paint.Also a specimen of new drying oil, which assists itsdrying without impairing the delicacy of colour. Perma-nent and Paris green paints. Brunswick green paints.Metallic red paint. Anti-corrosion, of all colours andshades. Stucco paint, an oil paint used with water;invented by the exhibitors. Patent dryer. Compositionfor ships’ bottoms. Oils.—Linseed oil, raw, refined,and boiled. Rape oil.—Brown, refined for locomotiveengines, and double refined for burning in lamps.
Varnishes for coachmakers.—Body, carriage, filling,black japan.
Varnishes for painters.—Oak, mahogany, black japan,furniture, japanners’ gold size, quick-drying copal forfurniture. Mastic or picture. White hard spirit. Papervarnish. Turpentine varnish.
Green varnish for Venetian blinds, &c.
Black varnish for ships and iron work.
French polish.
49 Bankart, F., Swansea —Producer.
Crystals of sulphate of iron.
50 Godson, Septimus H., Tenbury, Worcestershire , and
Rutland Gate, London —Proprietor.
Samples of native mineral waters.
These mineral waters concentrated and tested, to showtheir mineral constituents.
A phial showing the bromine present in the waters,extracted by ether, and floating in it.
A phial with salts found in the Tenbury mineral water.
51 Dinneford & Co., 172 New Bond Street —Inventors
and Manufacturers.
Specimens of magnesian minerals, and chemicals.Samples of Dinneford’s pure fluid magnesia.
[The principal minerals, of which magnesia forms animportant part, are the sulphate (Epsom salts), the car-bonate (magnesite), the silicate (meerschaum, talc andserpentine), and the carbonate of lime and magnesia(dolomite). From any of these may be obtained thehydro-carbonate much used in pharmacy (magnesia alba),and also the earth magnesia (prot-oxide of magnesium);but they are chiefly manufactured either from the car-bonate or sulphate.—D. T. A.]
52 Schilling & Sutton, Brighton —Manufacturers.Samples of soda, Seltzer, and Fachingen water.Effervescing lemonade.
52a Struve & Co., Royal German Spa, Brighton —Manufacturers.
Artificial mineral waters, of similar composition to thesprings at Spa, Pyrmont, Marienbad, Kissingen , Seltzer,I aehingen, Piillna, and Vichy. The factitious chalybeatesare said to contain the carbonate of iron in solution,whereas in those imported, a part, or the whole is pre-cipitated.
53 Kane, William Joseph, Dublin —Manufacturer.Specimen of salt cake (sulphate of soda), made in
brick fui’naces, with complete condensation of the muriaticacid evolved.
Specimen of bleaching powder, made from the muriaticacid condensed.
[Bleaching powder is procured by exposing, in a stonechamber, powdered hydrate of lime, or slaked lime, to thefumes of chlorine gas, developed from a mixture of bin-
oxide of manganese, coloride of rodium (common salt),and diluted sulphuric acid. After an exposure of certainlength, the lime absorbs, and appears to combine with thechlorine, which it afterwards retains. It is, therefore,valuable for all purposes where the powerfully bleachingeffects of chlorine are required, and is employed in vastquantities in the calico bleach-works, and similar esta-blishments for the bleaching of linen and other goods.—R. E.]
Specimen of iron pyrites (bi-sulphuret of iron), fromMessrs. Williams and Sons’ Tigroney Mines, countyWicklow, Ireland .
Specimen of manganese ore, containing 90 per cent, ofper-oxide of manganese, from Glandore Mines, countyCork, Ireland . _
54 Ward, Smith, & Co., Glasgow —Manufacturers.
Iodine. Muriate of potash. Sulphate of potash.
Alkali salt.
55 Fowler, John, 35 Bedford Street, Covent Garden —
Chemist.
Specimens of pure benzoic acid.
56 Lawrence, William, 163 Sloane Street —
Manufacturer.
Specimens of cod-liver oil.
57 Brown, Frederick, 12 Eccleston Place , Pimlico —
Patentee and Manufacturer.
Colours manufactured from the oxide of zinc, applicablefor painting in distemper, on porcelain and boards, forpaper staining, and for oil-cloth.
The qualities of these paints are stated to be theirfreedom from noxious properties, their permanency,and economy. They are not acted upon by gases. Spe-cimen board painted with various colours in zinc paint.
58 Ellam, Jones, & Co., Markeaton Mills, Derby —
Manufacturers.
Emery—Granular rhomboliedral corundum-stone, fromNaxos, in Asia Minor : consisting of alumina, 86*0; silica,3*0; oxide of iron, 4*0; and crocus (oxide of iron), forpolishing fine steel and plated ware.
Mineral and vegetable colours (native and manufac-tured).
Mineral — sulphate of barytes, carbonate of barytes,carbonate of lime, syenite, cannel coal, mineral white,mineral black, blue-black, lapis calaminaris, dream ochre,gold ochre, mineral yellow, metallic red, umber, whiterotten-stone, brown rotten-stone, bole armeniac.
Vegetable colours—Dutch pink, English pink, Bruns-wick green, Saxon green, Derby red.
59 Russell & Robertson, Omoa Foundery, Holytown ,
Lanarkshire —Inventors.
Specimens of white-lead paint, or ceruse, yellowchromate of lead, and red di-chromate of lead; manufac-tured by a new process, and solely in the humid way.
The usual mode of converting blue lead into whitelead, by the action of acetic acid, occupies six weeksor two months, whereas by the new process the same endis attained in one day, without endangering the health ofthe workmen.
[White lead is the well-known pigment, which whenground in linseed oil is used in house painting. It is acarbonate of lead, generally containing hydrated oxide oflead, which is sometimes combined in the proportion ofone atom of hydrated oxide to two of carbonate of lead.The most usual method (the Dutch ) of manufacturingwhite-lead is likewise the oldest. It consists in exposinglead to the joint action of acetic acid vapour, moist air,and carbonic acid gas. The lead is cast in the form ofstars or gratings, and supported a little above the bottomof earthen pots (in shape like garden pots), into each oxwhich a small quantity of weak acetic acid is placed. The