The 1683 Obici virginal has original jacks afik. the mortice punches are
curved above and below. I have no theory about this. It has never had
anything but bird quills in it.

-- 
 Rodney Myrvaagnes
  [log in to unmask]

On Sat, Jan 2, 2016, at 10:58, Domenico Statuto wrote:
> And by the way, is the curved slot a historically ascertained feature?
> I am asking because as many of you know I own an italian antique (1699)
> with more than half of the jacks/tongues original, and they have
> rectangular slots, so I wonder...
> 
> Moreover, I did make two sets of jacks for two harpsichords of mine, I
> punched a rectangular slot, with the rectangle having the short side just
> a tad longer than usual (1 mm instead of 0,5. I quilled with bird quill
> (one harpsichord in goose, the other in crow), and everything went fine:
> the quills are still firmly there while retaining the arched shape of the
> upper side.
> I'm sure I'm missing something but what?
> 
> Regards,
> Domenico
> 
> 
> 
> > Il giorno 02/gen/2016, alle ore 16:24, Daniel Jencka <[log in to unmask]> ha scritto:
> > 
> > Hello David,
> > 
> > Thanks for your comments below about goose vs. crow and the mortise shape. I have plastic jacks with the typical rectangular mortise in the tongues. Will goose quill work with these? (Someday I would like to convert to wooden jacks if I can ever afford it.) or do they need to be somehow modified or treated because it is plastic rathervthan wood?
> > 
> > 
> > 
> > "Crow v Goose
> > 
> > I have been using Canada Goose quills for some years now.  They have 
> > the advantage that they fit into flat slots, such as are made for 
> > delrin, whereas crow needs curved slots.  But I am interested to know 
> > whether flat-slotted jacks have survived from before 1800, or were 
> > they all curved, indicating that goose was not used?
> > 
> > Another difference is that the goose feathers have fibres in them 
> > that I dont think are found in crow.  This must have SOME effect."
> > 
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versity of Iowa.  For a brief  summary of list  commands, send mail to
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