A little political economy, therefore, will at least do no harm to a woman; especially if she have to take care of herself in after life; neither, I think, will she be much harmed by some sound knowledge of another subject, which I see promised in these lectures,—­“Natural philosophy, in its various branches, such as the chemistry of common life, light, heat, electricity, &c., &c.”

A little knowledge of the laws of light, for instance, would teach many women that by shutting themselves up day after day, week after week, in darkened rooms, they are as certainly committing a waste of health, destroying their vital energy, and diseasing their brains, as if they were taking so much poison the whole time.

A little knowledge of the laws of heat would teach women not to clothe themselves and their children after foolish and insufficient fashions, which in this climate sow the seeds of a dozen different diseases, and have to be atoned for by perpetual anxieties, and by perpetual doctors’ bills; and as for a little knowledge of the laws of electricity, one thrift I am sure it would produce—­thrift to us men, of having to answer continual inquiries as to what the weather is going to be, when a slight knowledge of the barometer, or of the form of the clouds and the direction of the wind, would enable many a lady to judge for herself, and not, after inquiry on inquiry, disregard all warnings, go out on the first appearance of a strip of blue sky, and come home wet through, with what she calls “only a chill,” but which really means a nail driven into her coffin—­a probable shortening, though it may be a very small one, of her mortal life; because the food of the next twenty-four hours, which should have gone to keep the vital heat at its normal standard, will have to be wasted in raising it up to that standard, from which it has fallen by a chill.

Ladies; these are subjects on which I must beg to speak a little more at length, premising them by one statement, which may seem jest, but is solemn earnest—­that, if the medical men of this or any other city were what the world now calls “alive to their own interests”—­that is, to the mere making of money; instead of being, what medical men are, the most generous, disinterested, and high-minded class in these realms, then they would oppose by all means in their power the delivery of lectures on natural philosophy to women.  For if women act upon what they learn in those lectures—­and having women’s hearts, they will act upon it—­there ought to follow a decrease of sickness and an increase of health, especially among children; a thrift of life, and a thrift of expense besides, which would very seriously affect the income of medical men.