s sound. The rat- are made of metal—hardened steel. The bars rest at tle, or cricket, their nodes on soft woolen cords, secured to the upper produces such edges of a resonator forming the support of the entire sounds. series of bars. The resonator is tapered both as to The wooden width and depth,… … pulling in opposite directions on the twisted endless cord, allowing the disk to twist the cord in the reverse THE HETALOFHONB. direction, then again pulling the cord, and so on. ward movement produces an air wave which moves .<;.>;■«!-x^j*. downward, strikes the bottom of the resonator, and…
