MOTHER: Yes, that is the way with this door-keeper. But sometimes the door closes very tightly, and then there is trouble, for that which can not get through the second door must find its way back through the first. We should be very careful about swallowing large seeds of fruit, buttons, or anything that is hard and can not be digested. People are sometimes made very ill in this way. But now we will learn what is done in the second room. Perhaps it might be called the “serving room;” for it is here the food is made ready for the eating room. Here we find two assistant cooks. The name of one is Pan-cre-at´ic Juice, and the other is called Bile. Each one has a room of his own. Pan-cre-at´ic Juice has his home in a room back of the kitchen, which is called the pancreas. Bile lives in the largest room in the body-house, which is called the liver. The liver might be called a factory; for it has hundreds of little rooms in which Bile is made. It has a waiting room, called the gall, where Bile stays when he is not wanted. This tiny room is close to the liver, and from that Bile goes to the serving room. On the way he meets Pan-cre-at´ic Juice, and they go on to their work together. Bile, like some other servants, is hard to please, and he will do only one kind of work. It is the duty of these cooks to finish up the work that Gastric Juice has begun. Bile will work with hardly anything but fats, and it is his work to make them into such tiny drops that they can be used in the body. He must also furnish part of the fuel to keep the body warm. He sometimes gets lazy or angry if the master of the house gives him too much work, or if he sends too much fat or sugar into the serving room. The master of the house tells his friends he is “bilious,” which means that Bile is out of temper and wants less hard work and more rest. PERCY: Is Pan-cre-at´ic Juice so particular as Bile? MOTHER: No; he is much more obliging, and is willing to do anything that needs to be done. Together these helpers work over the food after it comes from the kitchen till it is very fine and creamy. AMY: Does this room look like the kitchen? MOTHER: The walls are very much the same, and they keep eating or sucking up the food that is wholly digested, much as a sponge sucks up water. A part is taken up this way and goes into the blood-vessels at once, but part is sent on to the eating room, where hundreds of little people are waiting for their breakfasts and dinners. HELEN: How does the eating room look? MOTHER: This room is very narrow and about twenty feet long. You must not think it is a straight room twenty feet long, for it is not. At one side it is fastened to a thin band, and the band is gathered like a frill or ruffle, so the room, though it is folded over and over, never gets tangled. Perhaps I might say it is like a tube more than a room.