This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1860 edition. Excerpt: ... LESSON SECOND. The Human Body. What kinds of substance are found in the human body? Solids and fluids. What is a solid? That is called a solid, the small parts of which adhere together so closely and firmly, that they do not separate by their own weight. A stone, a piece of wood, a lump of clay, a leaf, Sec, are solids. What is a fluid? That is called a fluid, the parts of which adhere together so feebly as to separate readily by their own weight, when not confined in a vessel. The parts of a fluid move easily among themselves, and readily change places, in any direction, with each other. Water, milk, blood, and all kinds of liquor, are fluids. Will you name some of the solids and some of the fluids of the body? Bones, muscles, and nerves, are solids. Blood, tears, and gall, are fluids. Which is the hardest solid in the body 1 Bone. Where are the bones in man placed? Under the skin and flesh of the body. Where are the bones of lobsters, oysters, clams, crabs, and other shell-fish, placed? On the outside of the body. Their bones are called shells, and serve to protect them from injury. Why are the bones of man not on the outside of the body? If he was covered with bone as an oyster is, he could have but little feeling or knowledge. Of what use are bones to man? They make his body stronger, and keep it upright. When a carpenter builds a house, he makfs and raises the frame first. Bones are the frame of the body. The flesh and skin are put on them as the carpenter puts boards, shingles, and plaster, on the houseframe. Are the bones of children hard t No; the bones of children are very soft, and easily bent; but they become harder and stiffer as life advances. The bones of old people are dry, hard, and brittle. Children are sometimes taught...