page show good and bad positions and also the effects of bad positions.

[Illustration: PROPER POSITION.]

~5. Seats and Desks.~--The seats and desks of school-children should be
of proper height. The seats should be low enough to allow the feet to
rest easily upon the floor, but not too low. The desk should be of such
a height that, in writing, one shoulder will not be raised above the
other. If a young person bends the body forward, he will, after a time,
become round-shouldered and his chest will become so flattened that the
lungs cannot be well expanded.

[Illustration: DESK TOO HIGH.]

~6.~ Standing on one foot, sitting bent forward when reading or at work,
sleeping with the head raised high upon a thick pillow or bolster, are
ways in which young persons often grow out of shape.

[Illustration: SEAT TOO HIGH.]

~7. The Clothing.~--Wearing the clothing tight about the waist often
produces serious deformities of the bones of the trunk, and makes the
chest so small that the lungs have not room to act properly. Tight or
high-heeled shoes also often deform and injure the feet and make the
gait stiff and awkward.

~8. Broken Bones.~--By rough play or by accident the bones may be broken
in two just as you might break a stick. If the broken parts are placed
right, Nature will cement them together and make the bone strong again;
but sometimes the bones do not unite, and sometimes they grow together