Paris, as a centre, is pushing out other lines, with intermediate branches. Marseille, Bordeaux, Nantes, Rouen, Dieppe, Boulogne, Calais, and Lille, are the outposts of this series of radiation. The latest move is a line from Caen to Cherbourg; it will start from the Paris and Rouen Railway at Rosny, 40 miles from Paris, and proceed through Caen to the great naval station at Cherbourg--a distance of 191 miles from Rosny. By the time the great lines in France are finished--probably 3500 miles in the whole--it is expected that the total expenditure will amount, in round numbers, to a hundred millions sterling. It is gratifying to know, that the small German powers which border on France have been most active in providing themselves with railways; not only for their own accommodation, but to join the lines of other countries; so as to make great trunk-thoroughfares through their dominions. There seems to be a cordiality in making these junctions, for general accommodation, that cannot but deserve praise. The truth, however, is, that all these petty states are glad to get hold of means for bringing travellers--that is, money-spenders--to their cities and watering-places, and for developing their long-hidden resources. For example, in the district lying between Saarbrueck and Manheim, there exist vast beds of coal, and powerful brine-springs; but hitherto, in consequence of being out of the way of traffic, and there being only wretched cars drawn by cows, as the means of locomotion, this great mineral wealth has been locked up, and next thing to useless. What an outlet will the Strasbourg and Manheim Railway furnish! Paris may be as well and as cheaply supplied with coal as London.