ARTICLE I.--The High Contracting Parties mutually engage not to have in the Black Sea any other vessels of war than those of which the number, the force, and the dimensions are hereinafter stipulated. ARTICLE II.--The High Contracting Parties reserve to themselves each to maintain in that sea 6 steamships of 50 metres in length at the time of flotation, of a tonnage of 800 tons at the maximum, and 4 light steam or sailing vessels of a tonnage which shall not exceed 200 tons each. AN UP-TO-DATE MAIL STEAMER (1856). =Source.=--_Annual Register_, 1856, vol. 98; _Chronicle_, p. 1. A magnificent iron paddle-wheel steamship the _Persia_, built by Napier and Sons, of Glasgow, for the Cunard Company, has made her trial trip. This ship will be the largest steamship afloat in the world, until another shall have been built which shall surpass her. Such have been the advances made in our ideas of ships, and especially of steamships of late years, that the giant of to-day is the pigmy of to-morrow; and the chief use of these records is to show what was a magnificent ship at the commencement of 1856. The _Persia_ is built of iron; her dimensions are: Length from figurehead to taffrail, 390 feet; length in the water, 360 feet; breadth of the hull, 45 feet; breadth over all, 71 feet; depth, 32 feet; burden, 3,600 tons; diameter of paddle-wheels, 40 feet. By the Government rule of measure, her steam-power would be equal to 900 horses; according to Watt’s mode of reckoning it would be equal to 4,000 horses at least. The ship is of beautiful model, and combined so as to secure the greatest mechanical strength. Her keel-plates are of sheet-iron, 11/16 of an inch thick; the bottom plates 15/16; up to the water-line, 11/16. She is divided into seven water-tight compartments, besides which she has, in effect, a double bottom. She has two engines and eight boilers. She will afford separate and roomy accommodation for 260 passengers, and will carry a crew of 150 men. Besides splendid saloons and all other requisite apartments for her passengers, she has a bakery, butcher’s shambles, scullery, cow-house, carpenter’s shop, doctor’s shop, ice-houses, bath-rooms, and twenty water-closets. The builders’ calculations as to her speed were not disappointed, for on her voyage round from Glasgow to Liverpool she made an average of more than 16 knots, or 19 miles an hour. RUBINSTEIN IN LONDON: FIRST APPEARANCE AT A PHILHARMONIC CONCERT (1857). =Source.=--_The Times_, May 19, 1857.