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A comprehensive dictionary of organ stops - Allen Organ Studio of ...

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DICTIONARY OF ORGAN STOPS.<br />

Prinzipal-Flbte—See Flute-Principal and Solo.<br />

PROGRESSIO HARMONICA.<br />

A Mixture stop composed <strong>of</strong> ranks which, instead <strong>of</strong> "breaking" (see<br />

Mixture), increase in number as the pitch rises. A variety <strong>of</strong> Progressio<br />

Harmonica was invented by Musikdirector Wilke, <strong>of</strong> Neu Ruppin. Its<br />

special function was to increase the power <strong>of</strong> the treble portion <strong>of</strong> the<br />

compass. The name is now loosely applied in Germany to Mixture <strong>stops</strong><br />

<strong>of</strong> various composition.<br />

PROLONGEMENT HARMONIQUE — (Fr.) Prolongement =<br />

prolongation.<br />

A mechanical device for sustaining a chord or note, even though the<br />

fingers be removed from the clavier. It is applied either by drawstop or<br />

pedal, according to one <strong>of</strong> two systems. In one case the chord or note is<br />

sustained until a release pedal be operated. In the other, the chord or<br />

note is sustained until such time as another (sustained in its turn) be<br />

depressed, or the movement thrown out <strong>of</strong> gear. The Prolongement<br />

Harmonique would be a valuable adjunct to a Solo <strong>organ</strong>. On an <strong>organ</strong><br />

so equipped, it would be possible, for instance, to sustain notes on the<br />

Tuba, leaving the hands free for intercalated passages on the full Great<br />

<strong>organ</strong>. As far as the author's knowledge extends, there are but two<br />

examples <strong>of</strong> the use <strong>of</strong> the Prolongement Harmonique in this country.<br />

Tewksbury Abbey (Michell & Thynne, 1887), since removed. Chamber<br />

<strong>Organ</strong> built by the Rev. Scotson Clark, formerly at the London <strong>Organ</strong><br />

School. It is used abroad, though infrequently.<br />

Pyramid—Equivalent to Cone. Pyramid-Diapason, etc.<br />

Pyramidflote.<br />

A variety <strong>of</strong> Querfiote <strong>of</strong> " pyramidical " or tapering structure. Liegnitz.<br />

See Flauto Traverso.<br />

Pyramidon— 16 ft.<br />

A stop invented by the Rev. Sir F. A. Gore Ouseley. The CCC note<br />

was produced from a stopped pipe measuring 2 ft. 9 in. high, 2 ft. 3 ins.<br />

square at the top, and 8 ins. square at the block. The pipe at the summit<br />

was, therefore, more than three times as large as at the mouth. In a letter<br />

to the author, dated a few years back, Mr. Henry Bryceson, a celebrated<br />

<strong>organ</strong> builder <strong>of</strong> the period, expressed himself as follows : " I believe the<br />

Pyramidon never passed the experimental stage in an <strong>organ</strong> built by<br />

Flight for Sir Fred. Ouseley's College Chapel in S. Wales. On enquiry he,<br />

(Flight) only smiled about the stop, so, evidently, he had no great opinion<br />

<strong>of</strong> it." The Pyramidon, <strong>of</strong> course, occupies too much soundboard space<br />

to be <strong>of</strong> any practical value. "Boxes "and "Cubes," into an orifice in<br />

1 1<br />

9

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