P. S. I’ve been to a lecture on good health. The man said there were two
parts to the air, a good part and a poison part, and every time we
breathe we keep in the good part, and breathe out the poison part. So if
a room were sealed up, air-tight, a man living in it would soon die, for
he would use up all the good part and leave the poison part. So we ought
to always let fresh air in, that hasn’t been breathed. He says in a
crowded room, if there is no fresh air coming in, we have to use over
what other folks have breathed, whether they are sick or well.