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valuable metal. These are supplied from three differentdistricts of the Peninsula—namely, from the mountainsof Arion, from the province of Lugo, and from theprovince of Orense, both in the kingdom of Galicia . Thisore is sold at 70 reals the quintal, and the smelted tin at395 reals, or 100 francs (4 1. 3s. Ad.) per quintal. Anotherore of oxidated tin, which contains some portion of silver,is quarried at Corrascolo, commune of Yilladepera, in theprovince of Zamora. It yields 55 per cent, of tin. In theExhibition are deposited specimens of tin from variousmines now being worked in the province of Orense; alsoa single sample of the tin of Zamora.]
7 Eire-clay, called barro de zamorci . Found in abun-dance, and used for the manufacture of kitchen utensilsand crucibles.
8 Ore of hydrous oxide of iron, from the St. Antoniomine, at Alamos, district of la Alberca; it contains 45 percent, of iron.
9 Ore of carbonate of iron, from the Beneficencia mineat Herrerias, district of la Herguijuela; it contains 40 percent, of iron.
10 Ore of sulphuret of lead, from the Marilla mine,district of Campillo de Salvatierra; it contains 62 per cent,of lead, and is found in a vein of from 6 to 12 inches thick.
11 Ore of carbonate of lead, from the same mine; foundin contact with the preceding, and containing 38 percent, of lead, and T l s per cent, of silver.
12 Yellow rock crystal, from the mine Carmen delBrazil, situated at Majaditas, district of Yillasbuenas. Itis worked like the topaz, and known in commerce by thename of the Bohemian topaz ; it varies much in price, ac-cording to the clearness and colour of its crystals.
21 The Leones a Asturian Company, Tola de Lena,Ov iedo —Pro ducer.
Specimens of steel.
22 Amor (I). Fernando), Cordova.
Ironstone from YiUafranca. At this place the oreforms an entire mountain of considerable size.
23 Giro (D. Juan), Malaga —Producer.Specimens of iron, from the works of El Angel.
24 The Pedroso Iron Company, Tedroso , Seville .Specimens of cast, rod, and plate iron.
Mineral coal.
26 In area (D. Jose Maria), Seville —Exhibitor.
Mass of copper.
27 The Inspector of Mines of the District of
Palencia —Province of Leon.
1 Coal, from the mines of the town of Barruelos .Various veins have been discovered of 3, 8, and 12 feet inthickness : five of these mines are in operation.
2 Coke, from the same works : made in the open air,in heaps, which give 200 to 400 arrobas of 25 lbs. each,according to their volume. One hundred parts of coalproduce forty-five of coke.
[The coal deposits of the Asturias are chiefly of thecarboniferous period, and rise from beneath tertiary rocks,covering the plains of Leon and Castille. They are highlyinclined, and consist of numerous alternations of grit andshale, with thin beds of limestone, together with coalseams, one of which is of good quality, and nearly 9 feetthick. After these, and below them, appear a multitudeof other seams, of older date than the coal of other coun-tries of Europe ; and connected with these beds, but
always below them, are several beds of haematite, one ofwhich is of pure ore, 50 feet thick, and extending to a con-siderable distance. These coal-fields, on the whole, mustbe regarded as of great value and extensive range, thoughat present the means of transport are too imperfect toallow of them being worked to advantage.—D. T. A.]
28 The Inspector of the Mines of Soria.
Mineral asplialte, found in an extent of more than twoleagues Spanish , impregnating sand-stone layers of con-siderable thickness, which form the base of the mountainrange of Picofrentes.
29 The Inspector of Mines of the District ofCordova.
Specimens of marble :—
1 Marble , from Fuente de los Frailes.
2 Marble from the quarries of Acebucliar.
3 Marble from the same quarries, differing in thecolour and direction of its vein.
4 Marble from Mojon, in the same formation.
5 Marble similar to No. 3.
7 Marble from the same place.
8 and 9 Marble from the quarries of the Cerro de Nu-estra Senora. Crystals of carbonate of prismo-rectangularform are abundant in the quarries.
[Cabra is situated amongst the triassic rocks of Spain ,but, like many other localities in the Peninsula, is rich inmetamorphic limestones and marbles.
The value of these marbles is infinitely variable, aswell as their respective qualities of solidity and shading.There is a marble from Aspeitia, employed for table-topsand chimney-pieces, that sells as high as 2-|- francs thesquare foot. Saragossa marble, in the rough block, sellsfor 1, 6, and even 40 reals the cubic vara (the vara beingequal to 0’89 cent.), and, when polished, it fetches 10, 42,and 160 reals, respectively. The beautiful marbles ofMadrid are priced at 2 francs, and those of Grenada from2 up to 8 francs the cubical foot. The state of the roadsand communications in those provinces is such as torender almost impossible the transport of heavy dead-weight material, and at once limits the employment ofthese marbles to the richer classes of each country, and somaintains the high prices cited. Eight specimens are tobe found in this collection of marbles from the Isle ofPines, in the near vicinity of Cuba , and in that localitymarbles have long been found in great abundance, butwithout having yet been used in the ricli Spanish colonyin question, which absolutely imports others, notwith-standing, from Italy and the United States .
The alabasters and other varieties of sulphated limescome from Saragossa, Santander, and Murcia ; the hy-draulic limes from Alava , where they are sold at theextremely moderate rate of 18 reals the quintal. Anothersubstance well deserving our attention is the phospliatedchalk, or phosphorate of Logrozan, in the province ofCaceres, in Old Estramadura. It is found in a stone-likestate, and in sufficient quantities to prove the basis ofuseful investment; for its efficacy in imparting fertility topoor soils, and restoring those which have become ex-hausted, is beyond dispute. This valuable substance,however, like to many others, still awaits the industrial“ hereafter” of Spain .]
30 -, D. Huelva.
Samples of marble, from a quarry in the district ofFuente-heridos.