himself in the rapid day and night without rest. The friction of the water is constant against him, and he never folds his fins and sleeps. The more I think the more I am convinced that the buoyancy of the air is very far greater than science admits, and under certain conditions it is superior to water as a supporting medium. Swift and mobile as is the swallow's wing, how much swifter and how much more mobile must be his eye! This rapid and ever-changing course is not followed for pleasure as if it were a mazy dance. The whole time as he floats, and glides, and wheels, his eye is intent on insects so small as to be invisible to us at a very short distance. These he gathers in the air, he sees what we cannot see, his eyes are to our eyes as his wings are to our limbs. If still further we were to consider the flow of the nerve force between the eye, the mind, and the wing, we should be face to face with problems which quite upset the ordinary ideas of matter as a solid thing. How is it that dull matter becomes thus inexpressibly sensitive? Is not the swallow's eye a miracle? Then his heart, for he sings as he flies; he makes love and converses, and all as he rushes along--his hopes, his fears, his little store of knowledge, and his wonderful journey by-and-by to Africa. Remember, he carries his life in his wings as we should say in our hands, for if by chance he should strike a solid object, his great speed renders the collision certain death. It stuns him, and if he recovers from that his beak is usually broken so that he must starve. Happily such accidents are rare. The great rapidity of a bird's heart beating so fast seems to render it peculiarly susceptible to death from shock. Great fright will sometimes kill a bird, as for instance, when they have wandered inside a room, and been thoughtlessly held in some one's hand. Without visible injury, the heart, after beating excessively violently, almost as rapidly slows, the nictitating membrane is drawn over the eyes, the head falls to one side, and the bird becomes lifeless from nervous exhaustion. The beautiful swallows, be tender to them, for they symbol all that is best in nature and all that is best in our hearts. BUCKHURST PARK.