ribs and stuff (was alternatives.)

[Delwin D Fandrich]

Newton Hunt wrote:

> If this happens you will have a "rolled bridge".  Mason's "spider"
> prevents case movement from occuring.  A movement of less than .015"
> will flatten a board.
>
>                     Newton

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This would only be true if the soundboard were behaving like an arch.  It does
not.  If it did most of the pianos being built today would leave the factories
with dead flat soundboards.

Del