Nor do teachers always secure enough pure air. The air of schoolrooms
is usually vitiated to such a degree that one on coming in from the
out-door air can detect a foul odor. But the air of a room ceases to
be fit to breathe long before an odor can be detected from its
impurities.

These are some of the chief factors which are proving so fatal to the
health of many of our teachers, and to interest and enthusiasm on the
part of the teacher in his work. Both for the sake of his health and
his work, every teacher should seek to control these three factors as
far as possible. Strain and worry and wear of nerves can be greatly
lessened by careful planning of work, by good organization and careful
management, and by exercise of the will to prohibit worry over matters
large or small when worry will not help solve them. The teacher can in
some degree determine what food he will eat, even if it means a change
of boarding-place. And surely every teacher can control the supply of
fresh air for the schoolroom and his bedroom, and this is perhaps the
most important of all.

_d. Experience._--The young teacher, without experience, may from
sheer embarrassment and lack of mastery fail to show the enthusiasm
which he feels, for embarrassment of any kind and enthusiasm do not
thrive well together. But if the teacher is really fundamentally
interested in his teaching, the enthusiasm will soon come. And better
a thousand times the young teacher who is earnestly fighting for
freedom and mastery in the recitation, than the old teacher who has
grown wearied of the routine and has made out of the recitation a
machine process.