Occasionally, Nature uses the diatonic scale familiar to our western civilization. When the wind unites its vibrations into the long shrill note we call the whistle, it is playing according to our musical rules. Water, when falling perpendicularly from a great height also gives forth a long, steady note. Even the rhythmical quality so essential to good music is not lacking in such phenomena as rain pattering on dry leaves. This sound has proved unusually appealing to many people. The Mexicans sometimes attempt to imitate it by means of clay rattles. Not only does the countryside continually sing a great symphony, but each region has its own acoustic properties. While large cities maintain a discordant and incessant roar, the country is filled with soft and pleasing voices. Birds, animals, water and wind give forth quaint musings of the most soothing nature. Once in a while the woods go on a musical jag and every instrument becomes discordant. Under the influence of the bright moonlight, the inhabitants of the South American jungles sometimes seem to go mad. The hoarse roars of the Tiger mingle with the piercing shrieks of Parrots and the shrill wailings of Monkeys, while the croaking of Bull Frogs and the dismal hoot of Owls is deafening. Jaguars scream as they chase Monkeys through the tree-tops. The various members of the plant kingdom are the principal instruments upon which the wind plays. Without the obstruction offered by plants, trees, rocks, and houses, we should not hear the wind at all. The trees, because of their size and exposed positions, are most noted as plant-musicians, but the grasses and herbs are also very susceptible to the caressings of the wind. Who has not heard and gloried in the music of the Pines? The sharp needles of these big conifers seem unusually fitted for esthetic expression. They are the Aeolian harps of the woods. During a storm, they sing in a mighty chorus of acclaim. At such a time, the breaking of many small branches sounds like the snapping of overstrained violin strings. Almost any tree located on a cliff or on the edge of a mountain, becomes a musician of the first order. It is apt to take on the sorrowful tendencies of solitude. The weepings, wailings, murmurings, groanings, sighs and whispers of the universe vibrate through its branches. It would seem as if such a tree were trying to express many mysterious wonders of which man has little knowledge.