The number of exhibitors, whose productions are now displayed in the Crystal Palace, is about 15,000. One-half of these are British subjects. The remainder represent the industry of more than forty other nations, comprising nearly every civilized country on the globe. The Exhibition is divided into four classes; 1. Raw Materials; 2. Machinery; 3. Manufactures; 4. Sculpture and the Fine Arts. A further division is made, according to the geographical position of the countries represented, those which lie within the warmer latitudes being placed near the centre of the building, and the colder countries at the extremities. The Crystal Palace, which was commenced on the 26th of September, and has accordingly been completed in the short space of seven months, occupies an extent of about 18 acres, measuring 1,851 feet in length, and 556 in breadth, and affords a frontage for the exhibition of goods amounting in the aggregate to over 10 miles. It can accommodate at one time 40,000 visitors.

An interesting debate took place in the British House of Commons on the 3d of April, upon a motion by Mr. Herries for the repeal of the Income Tax. In an elaborate speech supporting his motion, Mr. Herries maintained that the Income Tax was proposed by Sir Robert Peel in order to meet a peculiar emergency occasioned by the maladministration of the Whigs prior to 1841. He presented a minute calculation for the purpose of showing that two-sevenths of the tax might be remitted without damage to the financial interests of the nation, and that the remission of £1,560,000 would be a greater relief than the removal of the window-tax. In reply to Mr. Herries, the Chancellor of the Exchequer contended that the measures contemplated in the motion were of the most disastrous tendency, and recommended the House to vote an Income Tax for three years. On a division of the House, Mr. Herries' motion was lost by a majority of 48.

The subject of Colonial Expenditures has elicited a warm debate in the House of Commons. Sir William Molesworth argued in favor of giving the means of local self-government to all colonies which are not military stations nor convict settlements. The colonies cost the United Kingdom the enormous sum of £4,000,000 sterling. He believed the military force maintained in the various colonies might be cut down to less than half the present establishment without injury to the Government. Under proper regulations, 17,000 men would be sufficient for the colonial garrisons, instead of 45,000. For colonial services the troops should be paid by the colonies—for Imperial purposes, by the General Government. He contended that in the North American colonies, the expenditure for military affairs should be reduced £400,000 per annum, and in the West Indies £250,000. From the Australian colonies nearly the whole military force might be withdrawn to advantage. Unless the military operations were discontinued in South Africa, the war would cost £1,000,000 more than the value of the colony. In conclusion, he estimated that the adoption of his measures would save the Government at least £1,800,000 in military and civil expenditure. The views of Sir William Molesworth were ably sustained by other members, while, on the contrary, Lord John Russell declared they were of a ruinous tendency, and earnestly protested against their adoption. If the plan were carried into effect, the glory of the British nation would be destroyed. She could no longer maintain her proud position before the world. The integrity of her empire would be annihilated, and she would be exposed to the attack of foreign powers. The debate was finally adjourned without a division.

The latest intelligence concerning Miss Talbot, whose relation to the Roman Catholic controversy has produced such a general excitement in England, is her decision to accept of a proposal of marriage from Lord Edward Howard, a Catholic nobleman of wealth and character. Application was made by the friends of the parties for the consent of the Lord Chancellor, which was given without hesitation.

The British Government has presented a memorial to the Courts of Berlin and Vienna, on the subject of admitting non-German territories into the Confederation, and insisting on a strict adherence to the Treaty of Vienna.

A new cabinet has been formed in France, consisting of Baroche, Rouher, Fould, Leon-Faucher, Buffet, Chasseloup Laubat, de Crouseilhes, Randon and Maque. The most prominent of these ministers are Baroche, Fould, and Leon-Faucher. They are all taken from the minority of the Assembly, and their choice will increase the difference between the President and that body. Baroche and Fould were members of the ministry which was obliged to retire in January last, before the opposition of the Assembly. Leon-Faucher labors under the stigma of having used the telegraph for electioneering purposes, for which he was condemned by the vote of the constituent assembly. Buffet was minister of commerce and agriculture in the administration of O'Dillon-Barrot. He is inclined to free trade sentiments, agreeing for the most part with Leon-Faucher in his commercial views. De Crouseilhes is a legitimist. He is an ex-peer of France, but has been more distinguished for his private worth than his political ability. Chasseloup Laubat has been in official employment since 1828, though he is still under fifty years of age. The best debater in the new ministry is undoubtedly Baroche, whose sagacity and mental vigor cannot be mistaken.

The political condition of France is still the subject of much speculation, but no definite conclusions can be arrived at in the present fluctuations of parties. Every thing shows the uncertainty which pervades the public mind. The President has renounced the hope of improving his political prospects, by obtaining a revision of the constitution. This could not be carried without a majority of three-fourths of the Assembly, while at least nearly 190 of the most strenuous republicans are decidedly opposed to the measure. The government is now sustained by the legitimists, who perceive no immediate hope of the accomplishment of their favorite plans. The partisans of Cavaignac are in favor of the speedy resignation of the President. In their opinion, this is necessary, in order to anticipate the general election, and thus prevent the difficulties that would ensue by the dissolution of the Assembly, without an established executive. Others, on the contrary, are in favor of extending the Presidential term for the period of ten years. A reconciliation was about to take place, according to the general rumor, between the President and General Changarnier. The government has demanded of the cabinet at London the expulsion of Ledru Rollin and other active politicians among the French refugees. With the present facilities of communication between London and Paris, their influence was believed to be adverse to the policy of the French government, and to increase the difficulties of the existing crisis.

An insurrection, headed by the Duke of Saldanha, has been attempted in Cientra, Portugal. The insurgents were about five thousand in number, and displayed considerable determination. Their leader is a man of great energy, and has had no small experience in political disturbances. He belongs to the reactionary party. The King, who commands the army in person, has occupied the fortress of Santarem, and the chances of the insurgents appear desperate, although they are said to have some friends in the royal army. The garrison at Oporto have declared for Saldanha, and the inhabitants of that city are generally on his side. He had decided to abandon the contest, and embark for England, but was recalled by the insurgents.

The King of Naples has prohibited his subjects from taking part in the Exhibition of the World's Fair, and from being present at it as visitors. The King of Sardinia proposes to visit England during the Exhibition.

The Emperor of Russia has appointed a Committee of manufacturers and scientific men, under the Presidency of the Director General of Public Works to visit the Exhibition, and also to examine the principal manufacturing establishments of France. He has also given permission to his subjects who may attend the exhibition, to pass through France on complying with certain conditions.