Social intercourse -- a very limited thing in a half civilized country, becomes in our centers of civilization a great power. . ."

". . . every advance in social progress removes us more and more from the guidance of instinct, obliging us to depend upon reason for the assurance that our habits are really agreeable to the laws of health."

Health has its science as well as disease. . .

"Our school education ignores, in a thousand ways, the rules of healthy development."

"For what is done or learned by one class of women becomes, by virtue of their common womanhood, the property of all women."