Ebony bridge caps

[Ron Nossaman]

> Here's my question. In the 2nd piano example, maple and mahogany laminations: 
> since the specific gravity of mahogany (swietenia macrophylla= .51) is actually 
> less than that of maple (.63), this bridge is actually less dense than the stand 
> alone maple,  assuming absolute density is what we are looking at.
> 
> To my mind, this doesn't jive with the straight-up absolute density 
> explanations...unless... the effect of increased density occurs as much from the 
> layers of non-uniform densities introduced by layering different species (with 
> differing densities), as from the 
> actual absolute densities of the woods. 
> 
> Does this make any sense?
> 
> Jim I

I wondered when someone would bring that up. What's the 
specific gravity of the cured glue used in laminating the 
bridge root and gluing on the cap? I suspect bridge number two 
is still heavier than bridge number one.

I don't in any way buy some magic effect of apparent increased 
density from non-uniformity of less dense material.

Ron N