Many years ago an harpsichordist phoned me saying that after he returned 
from holidays all strings of his italian were close to the jacks. He 
took the instrument in my workshop and we both tried to understand what 
happened.
Guides were ok, everything was ok.....after a while I noticed a pale 
shadow at the left end of the nut.
It was clear that he nut has moved to the right about 5 mm. but it was 
still glued on the wrestplank !!
I had to unstrung the harpsichord, unglue the nut which was glued with 
PVA and reglue it in position with hide glue (also putting some nails 
under to fix the position, since the maker of this instrument has not 
done that !!).

Andrea Restelli


Il 05/03/16 10.32, Andrew Bernard ha scritto:
> Hi Andrew,
>
> I was quite wrong to say creep is not readily quantifiable. I do apologise. Here is possibly more than you could ever want to know about creep and creeop equations in materials science:
>
> https://en.wikipedia.org/wiki/Creep_(deformation)
>
> No mention of PVA glue here, but polymers are discussed, and it is interesting to note that creep in concrete is sometimes desirable to relieve what otherwise may be catastrophic cracking. Perhaps a harpsichord joint creeping a bit is more desirable than it catastrophically failing. [I really don’t know about this, though.]
>
> Andrew
>
>
>
>
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::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Note:  opinions  expressed on HPSCHD-L are those of the  individual con-
tributors and not necessarily  those of the list owners  nor of the Uni-
versity of Iowa.  For a brief  summary of list  commands, send mail to
[log in to unmask]  saying  HELP .
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