Extreme and long-continued  fatigue is  hostile to  the development and welfare of
any nervous system, and especially  to  that    of  children.   Not only    does    overfatigue
hinder  growth, but it  also    results in  the formation   of  certain toxins, or  poisons,    in
the organism,   which   are particularly    harmful to  nervous tissue. It  is  these   fatigue
toxins   that    account     for     many    of  the     nervous     and     mental  disorders   which
accompany   breakdowns  from    overwork.   On  the whole,  the evil    effects from
mental  overstrain  are more    to  be  feared  than    from    physical    overstrain.
The Effects of  Worry.—There    is, perhaps,    no  greater foe to  brain   growth  and
efficiency  than    the nervous and worn-out    condition   which   comes   from    loss    of
sleep   or  from    worry.  Experiments in  the psychological   laboratories    have    shown
that    nerve   cells   shrivel up  and lose    their   vitality    under   loss    of  sleep.  Let this    go
on  for any considerable    length  of  time,   and the loss    is  irreparable;    for the cells
can never   recuperate. This    is  especially  true    in  the case    of  children    or  young
people. Many    school  boys    and girls,  indeed  many    college students,   are making
slow    progress    in  their   studies not because they    are mentally    slow    or  inefficient,
not even    chiefly because they    lose    time    that    should  be  put on  their   lessons,    but
because they    are incapacitating  their   brains  for good    service through late    hours
and the consequent  loss    of  sleep.  Add to  this    condition   that    of  worry,  which
often   accompanies it  from    the fact    of  failure in  lessons,    and a   naturally   good    and
well-organized   nervous     system  is  sure    to  fail.   Worry,  from    whatever    cause,
should  be  avoided as  one would   avoid   poison, if  we  would   bring   ourselves   to  the
highest degree  of  efficiency. Not only    does    worry   temporarily unfit   the mind    for
its best    work,   but its evil    results are permanent,  since   the mind    is  left    with    a
poorly  developed   or  undone  nervous system  through which   to  work,   even    after
the cause   for worry   has been    removed and the worry   itself  has ceased.
Not only    should  each    individual  seek    to  control the causes  of  worry   in  his own
life,   but the home    and the school  should  force   upon    childhood   as  few causes  for
worry   as  may be. Children's  worry   over    fears   of  the dark,   over    sickness    and
death,  over    prospective but delayed punishment, over    the thousand    and one real
or  imaginary   troubles    of  childhood,  should  be  eliminated  so  far as  possible.
School   examinations    that    prey    on  the     peace   of  mind,   threats     of  failure     of
promotion,  all nagging and sarcasm,    and whatever    else    may cause   continued
pain    or  worry   to  sensitive   minds   should  be  barred  from    our schoolroom  methods
and practice.   The price   we  force   the child   to  pay for results through their   use is
too great   for them    to  be  tolerated.  We  must    seek    a   better  way.
The Factors in  Good    Nutrition.—For  the best    nutrition   there   is  necessity   first
of  all plenty  of  nourishing  and healthful   food.   Science and experience  have    both
