superstructure.

We shall best understand our story of the growth of science if we
think of each new principle as a stepping-stone which must fit
into its own particular niche; and if we reflect that the entire
structure of modern civilization would be different from what it
is, and less perfect than it is, had not that particular
stepping-stone been found and shaped and placed in position.
Taken as a whole, our stepping-stones lead us up and up towards
the alluring heights of an acropolis of knowledge, on which
stands the Temple of Modern Science. The story of the building of
this wonderful structure is in itself fascinating and beautiful.



I. PREHISTORIC SCIENCE

To speak of a prehistoric science may seem like a contradiction
of terms. The word prehistoric seems to imply barbarism, while
science, clearly enough, seems the outgrowth of civilization; but
rightly considered, there is no contradiction. For, on the one
hand, man had ceased to be a barbarian long before the beginning
of what we call the historical period; and, on the other hand,
science, of a kind, is no less a precursor and a cause of
civilization than it is a consequent. To get this clearly in
mind, we must ask ourselves: What, then, is science? The word
runs glibly enough upon the tongue of our every-day speech, but
it is not often, perhaps, that they who use it habitually ask
themselves just what it means. Yet the answer is not difficult. A
little attention will show that science, as the word is commonly