It consists in attaching to the loop or ventral segment of a vibrating body, e.g.
The tattooed immortal with cocoa skin sat forward, his magic vibrating in the air around him.
Essential are vibrating membranes between the cartilaginous framework, and next, special muscles for regulating the tension.
In 1747 he applied his new calculus to the problem of vibrating chords, the solution of which, as well as the theory of the oscillation of the air and the propagation of sound, had been given but incompletely by the geometricians who preceded him.
The smaller duff is separated by vibrating or rotating screens into a great number of sizes, which are cleaned by washing in continuous current or pulsating jigging machines, where the lighter coal rises to the surface and is removed by a stream of water, while the heavier waste falls and is discharged at a lower level, or through a valve at the bottom of the machine.
