How to Breathe.~--We should always take pains to expand the lungs well in breathing, and to use the entire chest, both the upper and the lower part.

Clothing should be worn in such a way that every portion of the chest can be expanded.

For this reason it is very wrong to wear the clothing tight about the waist.

Clothing so worn is likely to cause the lungs to become diseased.
~10.

Bad Habits.~--Students are very apt to make themselves flat-chested and round-shouldered by leaning over their desks while writing or studying.