An extensive and highly-important collection of objects is exhibited by Prussia and the conjoined States.They represent the various classes very fully, and give a forcible idea of the manufacturing resources of theseStates, and of the natural advantages derivable from the soil itself. The specimens of raw material and producein particular are extremely interesting ; and among them, the production of iron in a raw and preliminarystage of manufacture holds a prominent place. The production of zinc, also, forms an important feature in themetallurgical operations of these States, large quantities being annually exported to all parts of the world.Chemical preparations of interest are also exhibited. The specimens of wool represent the vast importanceof the production of this raw material to the manufacturers of the Zollverein generally, and of Saxony inparticular. Great interest also attaches to the beautiful specimens of amber in its natural and manufacturedstate. Some of these specimens are of a size rarely met with. The collection of this singular fossil resinforms an interesting feature in the local history of certain districts on the Samlandic coast. The amber-fisherywas, at a former period, of no small importance to the King of Prussia. Among the machines exhibited areseveral of interest. In this number must be considered the large and costly apparatus for the evaporation ofsyrup, made of beaten copper. This apparatus is of the most recent construction, and exhibits features ofskilful mechanical arrangement. A type-founding machine, agricultural implements, &c., are also shown.The philosophical instruments comprise several of a complicated character. An electro-magnetic self-registeringanemometer, and the electro-telegraphic arrangements adopted on all the Prussian Government lines, are amongthese. The great celebrity, also, of the manufacturers of balances of Berlin and other places in this Union ismaintained by the exhibition of several of these delicate and yaluable instruments. The textile manufacturesare illustrated by the specimens sent from a considerable number of manufacturers, both in cotton, wool, flax,and silk. The beautiful ornamental glass, and specimens of fine casting in iron, will also receive notice.Prom the porcelain works of Berlin have been forwarded some fine objects in illustration of the ceramic art.The objects included under the Pine Arts are such as will not be soon forgotten: among these is the statue ofthe Amazon, and several others in its immediate vicinity, of great beauty, and indicate elaborate care in thefinish.—R. E.

1.—PRUSSIA, BADEN, and other STATES op NORTHERN GERMANY.

Chief C'ommisssioner in London , Dr. ton Yiebahn, 43 Albion Street, Hyde Park.

Agents in London , Messrs. Stein and Hall, 70 Newgate Street, City.

I The Administration oe the Royal Prus-sian Smelting Works and Iron Boundery,Qleiwitz —Producer.

Samples of wrouglit-iron, as used for rollers, cast fromiron which has been refined in a furciace by the use ofgas; sheet- iron rollers; bar-iron rollers.

2 The Royal Prussian Iron W ores, Malapane,near Opeln.

Pair of hard cast-iron cylinders.

Several samples of materials and products prepared hya fire of vrood-coal in the Royal Ironworks at Malapane.

Specimens of brown iron ore; clay-iron ore; limestone;s ea-coal; coke; pig iron, foamy grey; ditto, grey metal;ditto from clay-iron ore not calcining; slags from melting0 th® clay-iron ore not calcining.

several coloured slags from the regular working of thefiigli furnace.

^ no iron of the finery by gas; mottled fine iron for the^ast of rollers ; light grey ditto, of the finery by gas (for1101 parts of machines as move at a high velocity).

Slags from refining the iron hy gas.

Fragment of a rail.

Flat, square, and round irons, of different sizes.

[The process of refining iron by gas consists in drivingcarbonic oxide through the melted mass, by wliich thecarbon is more effectually removed.—R. IT.]

Red calamine from the mines at Scharley , near Beuthm,in High Silesia; white ditto ditto; red ditto from the.Maria, Calamine Works, near Beutlim; white ditto ditto.

Zinc in drops; white zinc (oxide of zinc); cadmium(metal).

[These calamine earths are carbonates of oxide ofzinc combined with varying quantities of oxide of ironand aluminous earths. Some of these ores contain cad-mium. The territory of the Zollverein is the principalproducer of zinc. Silesia possesses the most extensivezinc works in the world; and their produce finds a con-spicuous place in the Great Exhibition , more especially as