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This is due partly to the action of those muscles attached to the larynx which are not connected with the movements of the vocal bands, and partly to the influence of the expiratory air-blast.
Kelley was trying to produce malleable iron in a new, rapid and effective way. It was merely an economy in manufacture he was endeavoring to attain. To this end he made a furnace into which passed an air-blast pipe, through which a stream of air was forced into the mass of melted metal. He produced refined iron.
Delicate pianissimo effects, somewhat resembling those of the Eolian lyre, are produced by playing the notes with the air-blast alone, without the aid of percussion.
Panting men were hard at work with levers and pike-poles striving to wrench the massive trunk clear, and one lighted an air-blast flare, whose red glare flickered athwart the strip of water foaming between the piers. It showed that some of the logs forced up by the pressure were sliding out above the others, while, amid a horrible grinding, some sank.
Heigho! My brother is the weeping crocodile, and the five winds are my wits. Shall we dress? Even with a maid and the electric air-blast it will take time to dry my hair and dress it." When he came out of his dressing-room she was apparently still in the hands of the maid.
The main purpose, however, must be to connect the air-blast with the percussion apparatus in such a manner that, as soon as a key is depressed, the nozzle of that particular note in the air-blast is opened exactly at the same time that the wire is struck by the hammer, and it remains open as long as the note is held down.
The air rushing out gave us an impetus that carried us many miles out into space, and it required many hours for the slight attraction of the mass here to draw us back to it. We just got back a few minutes ago. That air-blast is probably what saved us, as they destroyed our vessel with atomic bombs and hunted down the four men of our crew, who stayed comparatively close to the scene.
The air-blast type of note-continuer for sostenuto effect therefore offers the most promising outlook for the improvement of the modern piano in the direction indicated.
The iron-furnace, with its alternating smoke puff and dull red flare, struck the one jarring note in a symphony blown otherwise on great nature's organ-pipes; but to Thomas Jefferson the furnace was as much a part of the immutable scheme as the hills or the forests or the creek which furnished the motive power for its air-blast.
The movement of an extra pedal, however, has the effect of throwing the whole of the air-blast apparatus out of gear and reducing the piano to a percussion instrument, pure and simple. It will be on the concert platform, no doubt, that this kind of improvement will find its first field of usefulness.
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