h it might do, we should be surprised to see
how few of his predictions had come to pass. He might have fancied
aerial navigation and a number of other triumphs of the same class, but
he would hardly have had either steam navigation or the telegraph in
his picture. In 1856 an article appeared in Harper's Magazine depicting
some anticipated features of life in A.D. 3000. We have since made
great advances, but they bear little resemblance to what the writer
imagined. He did not dream of the telephone, but did describe much that
has not yet come to pass and probably never will.

The fact is that, much as the nineteenth century has done, its last
work was to amuse itself by setting forth more problems for this
century to solve than it has ever itself succeeded in mastering. We
should not be far wrong in saying that to-day there are more riddles in
the universe than there were before men knew that it contained anything
more than the objects they could see.

So far as mere material progress is concerned, it may be doubtful
whether anything so epoch-making as the steam-engine or the telegraph
is held in store for us by the future. But in the field of purely
scientific discovery we are finding a crowd of things of which our
philosophy did not dream even ten years ago.

The greatest riddles which the nineteenth century has bequeathed to us
relate to subjects so widely separated as the structure of the universe
and the structure of atoms of matter. We see more and more of these
structures, and we see more and more of unity everywhere, and yet new
facts difficult of explanation are being added more rapidly than old
facts are being explained.

We all know that the nineteenth century was marked by a separation of
the sciences into a vast number of specialties, to the subdivisions of
which one could see no end. But the great work of the twentieth century
will be to combine many of these specialties. The physical philosopher
of the present time is directing his thought to the demonstration of
the unity of creation. Astronomical and physical researches are now
being united in a way which is bringing the infinitely great and the
infinitely small into one field of knowledge. Ten years ago the atoms
of matter, of which it takes millions of millions to make a drop of
water, were the minutest objects with which science could imagine
itself to be concerned, Now a body of experimentalists, prominent among
whom stand Professors J. J. Thomp