You are correct.  Multiple trains of thought while writing and my nomenclature got crossed up. (Was actually also working on some handbow building pointers for another bunch of folks at the same time)
 
Thanks Alden, I don't want to end up confusing folks but sometimes manage to anyway.
 
Chris

>
>
> On Mon, 7 Mar 2011, Kazimierz Verkmastare wrote:
>
>
>> As for what your bridge is made of, finding and orienting wood
>> for bridges is a mystic art indeed.  I find close grained hard
>> maple at my local woodcutter, and create thin planks (3/8" or so)
>> of flat-sawn lumber from bigger pieces with my bandsaw and hand
>> planes.  Having the grain lines oriented parallel to one face of
>> the board is necessary, because though sound vibration carries in
>> the heartwood section (the lighter wood between the rings)
>>
>
> Just a small point of nomenclature here:
>
> "Heartwood" refers to the dense wood at the center of the tree.
> "Sapwood" refers to the outer layer of wood closest to the bark
> that has not yet become heartwood.
>
> When wood is cut, we see the rings of the tree's growth.  For each
> year of growth, we see an area of lower density, from when the tree
> grows quickly during spring and summer.  This is called the "early
> wood".  We also see an area of higher density from the slower
> growth during the fall and winter.  This is called the "late wood".
>
> I believe that you are referring to the early wood and late wood
> variation here, not heartwood and sapwood.
>
> Alden

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