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Neither do we know how much more the co-operation of minds or of

hands may be capable of accomplishing, whether in labour or in

study. The resources of the natural sciences are not

half-developed as yet; the soil of the earth, instead of growing

more barren, may become many times more fertile than hitherto;

the uses of machinery far greater, and also more minute than at

present. New secrets of physiology may be revealed, deeply

affecting human nature in its innermost recesses. The standard of

health may be raised and the lives of men prolonged by sanitary

and medical knowledge. There may be peace, there may be leisure,

there may be innocent refreshments of many kinds. The

ever-increasing power of locomotion may join the extremes of

earth. There may be mysterious workings of the human mind, such

as occur only at great crises of history. The East and the West

may meet together, and all nations may contribute their thoughts

and their experience to the common stock of humanity.