46
SEX IN EDUCATION.
and albumen which repair their constant waste, thus supplying their daily bread; and as unceasingly conveying away from every gland and tissue, from every nerve and organ, the oxidized refuse, which are both the result and measure of their work. Like the water flowing through the canals of Venice, that carries health and wealth to the portals of every house, and filth and disease from every doorway, the blood flowing through the canals of the organization carries nutriment to all the tissues, and refuse from them. Its current sweeps nourishment in, and waste out. The former, it yields to the body for assimilation ; the latter, it deposits with the organs of elimination for rejection. In order to have good blood, then, two things are essential : first, a regular and sufficient supply of nutriment, and, secondly, an equally regular and sufficient removal of waste. Insufficient nourishment starves the blood; insufficient elimination poisons it. A wise housekeeper will look as carefully after the condition of his drains as after the quality of his food.