It must seem to foreigners of all things the strangest, that, in a country where land is sold at one dollar and twenty-five cents the acre by the square mile, there should in any considerable part of it be a want of room,--any necessity for crowding the population into pent-up cities,--any narrowness of streets, or want of commons and parks. And yet it is an undeniable truth that our American cities are all suffering the want of ample thoroughfares, destitute of adequate parks and commons, and too much crowded for health, convenience, or beauty. Boston has for its main street a serpentine lane, wide enough to drive the cows home from their pastures, but totally and almost fatally inadequate to be the great artery of a city of two hundred thousand people. Philadelphia is little better off with her narrow Chestnut Street, which purchases what accommodation it affords by admitting the parallel streets to nearly equal use, and thus sacrificing the very idea of a metropolitan thoroughfare, in which the splendor and motion and life of a metropolis ought to be concentrated. New York succeeds in making Broadway what the Toledo, the Strand, the Linden Strasse, the Italian Boulevards are; but the street is notoriously blocked and confused, and occasions more loss of time and temper and life and limb than would amply repay, once in five years, the widening of it to double its present breadth. It is a great misfortune, that our commercial metropolis, the predestined home of five millions of people, should not have a single street worthy of the population, the wealth, the architectural ambition ready to fill and adorn it. Wholesale trade, bankers, brokers, and lawyers seek narrow streets. There must be swift communication between the opposite sides, and easy recognition of faces across the way. But retail trade requires no such conditions. The passers up and down on opposite sides of Broadway are as if in different streets, and neither expect to recognize each other nor to pass from one to the other without set effort. It took a good while to make Broad and Canal Streets attractive business-streets, and to get the importers and jobbers out of Pearl Street; but the work is now done. The Bowery affords the only remaining chance of building a magnificent metropolitan thoroughfare in New York; and we anticipate the day--when Broadway will surrender its pretensions to that now modest Cheapside. Already, about the confluence of the Third and Fourth Avenues at Eighth Street are congregated some of the chief institutions of the city,--the Bible House, the Cooper Institute, the Astor Library, the Mercantile Library. Farther down, the continuation of Canal Street affords the most commanding sites for future public edifices; while the neighborhoods of Franklin and Chatham Squares ought to be seized upon to embellish the city at imperial points with its finest architectural piles. The capacities of New York, below