ox, sheep, and pig, bred merely for food, enlarged development is of course desirable; but even in these it is not increase of the height but increase of the trunk, that is, of flesh, that is sought for.

The external form of the body being of the perfect or normal character described, or nearly approaching

, it is requisite also that we consider the internal organs in a corresponding state of healthful development, and performing all their functions freely and reglarly. First, as to the organs of supply: after a few hours' abstinence the stomach should give notice of the wants of the general economy, by a craving for food, which, being taken in due quantity, and duly prepared by mastication, should in a short time be converted into chyme, the nutritive portion be extracted by the lacteal vessels, and the refuse be carried onward through the intestinal canal and expelled from the body. Meantime, the contents of the lacteal vessels should be conveyed into the blood, and be carried by that fluid to every part of the body, to be subjected to the wonderful process of the chemistry of life. The sanguiferous system, which thus receives its supplies from the nutritive, must act in perfect correspondence with it. The heart is a double organ; the right side may be called the chamber of reception, the left side the chamber of distribution, whilst between

these two there stands the pulmonary circulation, or as it might well be called, the circulation of purification. Let us trace the course of the blood; the right auricle receives from the whole body, the dark venous blood, laden with the matters collected in its course by the capillary branches of the veins, or poured into the larger trunks by the lacteal and lymphatic vessels. In its passage through the lungs the blood is supposed to cast off a large quantity of carbonic acid and to absorb oxygen, and being thus purified it becomes the red arterial blood poured into the left side of the heart. This red blood is then propelled to every part of the body, to form and to sustain it. It gives out everywhere new matter, nearly similar in form, appearance and properties, to those effete portions which the absorbents are continually removing, so that the body, although perpetually changing, is but little altered in structure and appearance; or it deposits new matter wherever

it may be required, to increase the size and strength, or to repair the effects of injuries or disease.

In

the kidneys, the skin, the testicles, and in all glandular structures, it yields up all that the functions of those parts demand, and it gives out such matters as it is needful to cast forth from the body. Thus then Digestion, Respiration, Circulation, and

as the continued exercise of some parts, or the disuse of others, may occasion a greater or less degree of development. We shall afterwards see that as age creeps on, the balance is again disturbed, and the absorbents carry off more than the arteries can supply; the body consequently decreases in size, until the handsome, well-rounded form of manhood *

"Shrinks into the lean and slippered Pantaloon."

There is a regular chain in nature's works, demonstrating the uniformity, simplicity, and beauty of her designs. Inanimate matter is formed, and increases in size, in obedience to the immutable laws of mechanics and chemistry; and these laws equally affect all living things, but are modified in their action by the controlling power of vitality. The one great peculiarity of living bodies is, that although, even as inanimate bodies do, they grow by an aggregation of similar particles to each other, yet these particles are not, as it were, accidentally placed in juxta-position and united to each other by cohesion, but are drawn from sources wholly different from themselves, and by the vital powers are changed and moulded into the required structures. Thus the vegetable kingdom draws its support entirely from earth, water, and air; and, by the vital power converts these into the