The device most likely to be adopted, in the near future at all events, is something in the nature of elevated trottoirs roulants for goods. If we can conceive all the cities of a country to be linked-up by a system of great overways, we have at all events a feasible solution of the difficulty. There could be a double row of tall, massive pillars, between which could run a wide track, always in motion at considerable speed. It need not be a lightning speed. Most of the tardiness of railway transportation does not, in this country at all events, arise from slowness of trains, but from congestion at goods stations, and this in turn is due, partly to insufficiency of rolling stock, but much more to insufficiency of permanent way. The latter evil is very difficult to cope with. But the system of moving ways, providing a rolling stock equal in length to the line itself, will be a great saving. Returning upon itself the endless track will continuously transport merchandise in both directions. Elevators, suitably placed, will give access to it wherever needed. Probably the motive power will be electrical: and we may confidently anticipate entirely new sources of electricity. It is obviously clumsy to create power in the first instance, convert power into electricity (I use popular language), and then convert electricity back again into power. Much more hopeful than any idea of developing that method would be the conception of new ways of creating and applying motive-power directly. But, almost certainly, electricity, obtained in some new way, will do the work of the world for many generations yet--until, in fact, we devise or discover something more convenient. It will have been perceived that nearly every improvement and innovation above sketched out involves, and will be indeed designed to effect, great saving of labour. With such economies, and an increased population, there is evidently going to be a difficulty about employment. Moreover, the great facilities enjoyed by commerce will tend to make commerce extremely powerful. Already great organisers of business begin to evade competition by combining in vast "trusts," whose tendency is to make the rich richer and the poor poorer. There is a further cause for the aggrandisement of the large trader and manufacturer at the expense of the petty retail dealer. More and more every year the unprogressive methods of small shopkeepers foster the success of large multiple retailers. But it is likely that retail businesses, whether great or small, will ultimately tend to be eliminated. Manufacturers and trust companies will supply the public directly. What, then, will be the solution of the great social difficulties about to be created?