Alex, the ash bows are all heat treated, but only the 85# got really deep scorch. The yew is rather coarse, I took the sapwood down to two rings, suppose its the picture. Its also somehow flattish. (Oval) Its what I do with any materiall which is less than perfect - I just flatten the same profile.
Akila - if you make a bow with the same width as thickness, you will have very unstable profile, unless its completelly round and that is far less the ideal solution. MR bows are between 1.1 and 1.2 (width/depth) ratio in the middle, but thanks to low width taper they are more flatter midlimb. Given the leeway BLBS gives, you can go as much as 1.6 ratio and that is quite forgiving to make.
Cut small block of your ash. Put in the water slowly. Take out. Measure the submerged part and the dry part. From that you can calculate SG. For example a a piece of SG 0.9 will have 9/10 of the block submerged.
Jaro