Thanks guys
This Elm has sapwood with a yellowish colour which is usually an indication of good wood. The wood is stiffer than some and was a bit resistant to reflexing. You can see that the limbs are pretty thin for a 50# bow
Another test of elasticity, which to me is the most important property of bow wood, would be a D section bow and that will be for the future. Fortunately the tree was a good 10" in diameter so I have a good supply of it