Archive image from page 660 of The cyclopaedia; or, Universal dictionary. The cyclopaedia; or, Universal dictionary of arts, sciences, and literature cyclopaediaoru16rees Year: 1819 G R A G R A vote than any of its conflituciits, feeing the time of a cycle exceeds the greateft vibration that enters into the compofi- tion of it. The ftrength of a grave harmonic is alfo weak, when compared with the notes compofing it, becaufe thefe frcondary founds, being nothing more than certain unavoid- able efforts of the imagination, they affume the charaiter of a feeble found, which is jult ilrong enough
Archive image from page 660 of The cyclopaedia; or, Universal dictionary. The cyclopaedia; or, Universal dictionary of arts, sciences, and literature cyclopaediaoru16rees Year: 1819 G R A G R A vote than any of its conflituciits, feeing the time of a cycle exceeds the greateft vibration that enters into the compofi- tion of it. The ftrength of a grave harmonic is alfo weak, when compared with the notes compofing it, becaufe thefe frcondary founds, being nothing more than certain unavoid- able efforts of the imagination, they affume the charaiter of a feeble found, which is jult ilrong enough to he heard in the company of one or more londcr tones ; for tlie power of the imagination is always inferior to external impreflions, except in lits of infanity, when the organs of fenle appear to be bluated by phyfical caufes. • The grave harmonics always ieip the dircdlon of the ears, let the pofition of the head be changed as often as you pleafe, refembling m this circumilarice a {hrill piping note, called the ringing of the ears ; which every one afcribes to a flight affec1;ion of the auditory ducl:, becaufe it differs from external founds, in having no fixed direftion. The grave harmonics agree with the ringing of the ears in this remarkable particular ; which is a ftrong proof that their immediate canfe is feated in the perfon of the hearer; and it is evident from the nature of things, that this caufe originates in the mind.' Nicholfon's Jouvna', 8vo. , p. 2. , We have been thus particular in quoting from two very able writers on the fubjecl of the grave harmonics, or Tar- tinian founds, in order to fhew the foundation of the mles which we fhall here give, for determining the grave harmo- nic of any given perfect confonance, viz,. 1 ft. Find the number of tibfationS niade in one fecbnd of time by eacli of the given founds : which, fuppofing C-/- fa-til, or c of the German tablature, or that on which the tenor cliff is placed, to make tw o hundred and forty com- p
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