By Arthur T. Dolling.

HOSE imposing agglomerations of houses and dwellers we call cities (in most cases political or commercial capitals) have shown a notable rate of progress during the last two or three decades. More and more do the centripetal forces at work in almost every nation make for the growth of the capital at the expense of the rural community. A century ago a million human beings dwelling side by side under a single municipal government was almost of itself one of the great wonders of the world. Men spoke of London with bated breath and wondered where it would all end. Reports of monster cities in China with a population double that of London were dismissed as travellers' tales. Travellers' tales, verily, they have proved to be, seeing that Peking even to-day has fewer than a million souls. But what would our forefathers have said of these twentieth-century "wens," these "gloomy or glowing, febrile and throbbing concentrations" of human life, numbering not merely two, but three, four, and even five millions of souls?

LONDON: THE ADMINISTRATIVE COUNTY OF LONDON, WITH WHICH THE OTHER CITIES ARE COMPARED, IS SHOWN BY THE SHADED PORTION.

Let us take London as the basis of our diagrams. London is an indeterminate quantity. It may mean the City of London, which comprises only 673 acres, or it may mean the Administrative County of London, which boasts nearly 117 square miles, or 74,839 acres, or Greater London, which embraces the Metropolitan Police district, and has an area of no less than 692 square miles, or 443,420 acres. If we take the second of these Londons we shall find it to consist of twenty-nine large and small cities, ranging in population from 334,991 to 51,247 inhabitants. These are called the Metropolitan boroughs; but as it is rather geographical size than population which here concerns us, we may state that the largest of these boroughs is Wandsworth, with an area of 9,130 acres, and the smallest is Holborn, with 409 acres. The average area of these boroughs, if we exclude the City, is about four square miles. Within these borders of London—which must not be confounded with Greater London—there were in 1901 4,536,541 souls, living in 616,461 houses. Within this area, besides buildings, must be counted 12,054 acres of grass, including the public parks and gardens.

If we take Greater London we embrace a far wider and yet still a homogeneous community, for it cannot be denied that the adjoining boroughs just outside the pale of the administrative county are policed from the same centre, are London to the Post Office, and commonly regard themselves, what they must soon be officially, as an integral part of the Great Wen. Greater London—within the fifteen-mile radius—is far more homogeneous and compact than Greater Chicago, for example, or even than Greater New York or Greater Boston. We have here an aggregation of 6,580,000 inhabitants and, as we have already seen, 443,420 acres. But perhaps the fairest estimate of London is the natural one of a single mass of buildings, without any unoccupied or unimproved areas. This gives us a solid, compact city of 85,000 acres and 6,000,000 inhabitants; extending from Edmonton on the north to Croydon on the south, and east and west from Woolwich to Ealing. Nor can one doubt, at the present rate of expansion, that even more distant areas than Croydon will eventually be included, although the Scotsman may have been a little "previous" who addressed a letter to a friend at "Bournemouth, S.W."

A MAP OF PARIS PRINTED UPON A MAP OF LONDON, SHOWING THE RELATIVE SHAPES AND SIZES.

In the following article we propose to compare with London the sizes of the chief cities of the world and, by printing a black map of each city upon a map of London, to display their relative magnitude at a glance. Let us see, to begin with, how Paris compares with London as represented in the above diagram.