![[HS1-A1620.2 Harpsichord]](planview.jpg)
![[University of Edinburgh]](EUcrest.gif)
![[1764-84 Goermans 3-4 view]](Goermans.jpg)
| Distance | |
|---|---|
| d³ | 699.9 |
c ³ |
686.4 |
| c³ | 673.2 |
| b² | 659.7 |
b ² |
646.3 |
| a² | 633.0 |
| g² |
619.5 |
| g² | 606.0 |
| f² |
592.4 |
| f² | 579.0 |
| e² | 565.8 |
| e² |
552.2 |
| d² | 538.7 |
| c² |
525.3 |
| c² | 511.9 |
| b¹ | 498.5 |
| b¹ |
485.4 |
| a¹ | 471.9 |
| g¹ |
458.5 |
| g¹ | 445.1 |
| f¹ |
431.8 |
| f¹ | 418.3 |
| e¹ | 405.0 |
| e¹ |
391.7 |
| d¹ | 378.2 |
| c¹ |
365.1 |
| c¹ | 351.5 |
| b | 338.2 |
| b |
325.0 |
| a | 311.3 |
| g |
297.9 |
| g | 284.5 |
| f |
271.2 |
| f | 257.9 |
| e | 244.5 |
| e |
231.1 |
| d | 217.7 |
| c |
204.3 |
| c | 190.9 |
| B | 177.6 |
| B |
164.1 |
| A | 150.7 |
| G |
137.4 |
| G | 124.1 |
| F |
110.6 |
| F | 97.4 |
| E | 84.1 |
| E |
70.5 |
| D | 56.8 |
| C |
43.5 |
| C | 30.1 |
Approximate slope = 13.396mm/jackslot = 48996once/jackslot, based on an oncia of 27.341mm.
This appears to be a spacing of 51 jackslots in 25 once: 13.396mm/jackslot = 25once/51 jackslots
Hence: 1 oncia = 13.396 x51 /25 mm = 27.328mm
This compares with the value given by Krünitz1 for the bavelle divided into 10 once of 273.41mm, or that of Larousse2 who gives the braccio divided into 20 once of 548.15mm, so that 1 oncia = 27.408mm, both very close to this value.
Footnotes:
1See: Johann Georg Krüniß,
Öconomische Encykopädie oder allgemeines System der Staats-, Stadt-,
und Landwirtschaft, in alphabetischer Ordnung, 15
(Jospeh Georg Traßler, Brünn, 1788) p. 519-22.
These are given as 1440-th parts of the Paris pouce,
and were calculated using the pouce
given the the Aide-Mémoire, p. 896.
My thanks to John Koster for pointing out this source to me.
2See: Pierre Larousse, Grand Dictionnaire, (Paris, 1874).
Contents | Home Page| List of Instruments