have seen by what means their purpose was thwarted.

I have always felt that, among the countless evidences of the ordering
of Providence by which the war for the preservation of the Union was
signalized, not the least striking was the raising up of this remarkable
man, to accomplish alone, and in the very nick of time, a work which at
once became of such national importance.

This is the man who has crowned his useful career, and shown again his
eminently practical character and wise foresight, by the endowment of
this College, which cannot fail to be a perennial source of benefit to
the country whose interests he has done so much to promote, and which
his remarkable sagacity and energy contributed so much to preserve.

We have an excellent rule, followed by all successful designers of
machinery, which is, to make provision for the extreme case, for the
most severe test to which, under normal conditions, and so far as
practicable under abnormal conditions also, the machinery can be
subjected. Then, of course, any demands upon it which are less than the
extreme demand are not likely to give trouble. I shall apply this
principle in addressing you to-day. In what I have to say, I shall speak
directly to the youngest and least advanced minds among my auditors. If
I am successful in making an exposition of my subject which shall be
plain to them, then it is evident that I need not concern myself about
being understood by the higher class men and the professors.

The subject to which your attention is now invited is


THE PRINCIPLES AND METHODS OF BALANCING FORCES DEVELOPED IN MOVING