Many New-Yorkers, recognized among our young and active men, can recollect when Houston Street was called North Street because it was practically the northern boundary of the settled district. Middle-aged men remember the swamp of Lispenard's Meadow, which is now the dryest part of Canal Street; some recall how they crossed other parts of the swamp on boards, and how tide-water practically made a separate island of what is now the northern and much the larger portion of the city. Young men recollect making Saturday-afternoon appointments with their schoolfellows (there was no time on any other day) to go "clear out into the country," bathe in the rural cove at the foot of East Thirteenth Street, and, refreshed by their baths, proceed to bird's-nesting on the wilderness of the Stuyvesant Farm, where is now situate Stuyvesant Park, one of the loveliest and most elegant pleasure-grounds open to the New York public, surrounded by one of the best-settled portions of the city, in every sense of the word. Still younger men remember Fourteenth Street as the utmost northern limit of the wave of civilization; and comparative boys have seen Franconi's Hippodrome pitched in a vacant lot of the suburbs, where now the Fifth Avenue Hotel stands, at the entrance to a double mile of palaces, in the northern, southern, and western directions. We may safely affirm, that, since the organization of the science of statistics, no city in the world has ever multiplied its population, wealth, and internal resources of livelihood with a rapidity approaching that shown by New York. London has of late years made great progress quantitively, but her means of accommodating a healthy and happy population have kept no adequate pace with the increase of numbers. During the year 1862, 75,000 immigrants landed at the port of New York; in 1863, 150,000 more; and thus far in 1864 (we write in November) 200,000 have debarked here. Of these 425,000 immigrants, 40 per cent have stayed in the city. Of the 170,000 thus staying, 90 per cent, or 153,000, are British subjects; and of these, it is not understating to say that five eighths are dependent for their livelihood on physical labor of the most elementary kind. By comparing these estimates with the tax-list, it will appear that we have pushed our own inherent vitality to an extent of forty millions increase in our taxable property, and contributed to the support of the most gigantic war in human annals, during the period that we received into our grand civic digestion a city of British subjects as large as Bristol, and incorporated them into our own body politic with more comfort both to mass and particles than either had enjoyed at home.