A General History of the Science And Practice of Music volume 2
A General History of the Science And Practice of Music volume 2
John Hawkins
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' In some pipes the pulses are caused by springs, ' as the Regal stop of an organ, which is commonly * tuned by shortening the spring, whereby it becomes ' stronger, but the note will be changed by the alter- ' ation of the cavity ; and therefore to make them * steddy, some that stand upon very weak springs ' have pavilions set to them. ' A rustick instance may be given of the compliance * of a spring, in taking such vibrations as are pro- ' portionable to the cavity ; it is a Jews-harp, or ' J...ews-trump, the tongue whereof has natural vibra- ' tions according to the strength and length of the ' of the spring, and so is fitted to one particular tone ; '■ but countrymen framing their breath and their ' mouth to several notes make a shift to express a ' tune by it. '^In a shawm or hautboy the quill at the mouth is * a kind of spring, but so weak and indifferent, that it ' complies with any measure*, and therefore the tone ' will be according to the apertures of the pipe. ' The fluttering and jarring of discording sounds, ' which I did before observe, is so regular, and ' the sounds take their turns with equal interstices, ' which makes the joining of them produce a harsher ' sound than either had before ; whereby organ- ' makers imitate the hautboy or trumpet without any ' spring or quill, by joining discording pipes.
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