such is the case, wait patiently till he appears. Prudence
requires that the fewest possible risks would be taken, and that
no leader should be chosen except one of tried experience and
world-wide reputation. Yet we should not leave wholly out of sight
the success of the Johns Hopkins University in selecting, at its
very foundation, young men who were to prove themselves the
leaders of the future. This experience may admit of being
repeated, if it be carefully borne in mind that young men of
promise are to be avoided and young men of performance only to be
considered. The performance need not be striking: ex pede Herculem
may be possible; but we must be sure of the soundness of our
judgment before accepting our Hercules. This requires a master.
Clerk-Maxwell, who never left his native island to visit our
shores, is entitled to honor as a promoter of American science for
seeing the lion's paw in the early efforts of Rowland, for which
the latter was unable to find a medium of publication in his own
country. It must also be admitted that the task is more serious
now than it was then, because, from the constantly increasing
specialization of science, it has become difficult for a
specialist in one line to ascertain the soundness of work in
another. With all the risks that may be involved in the
proceeding, it will be quite possible to select an effective body
of leaders, young and old, with whom an institution can begin. The
wants of these men will be of the most varied kind. One needs
scarcely more than a study and library; another must have small
pieces of apparatus which he can perhaps design and make for
himself. Another may need apparatus and appliances so expensive
that only an institution at least as wealthy as an ordinary
university would be able to supply them. The apparatus required by
others will be very largely human--assistants of every grade, from