Gents,
Living in the "Elm City" (New Haven Connecticut) or close enough to smell it from here I have ready access to American Elm, of which I am going to use a stump to make a traditional anvil stand. Using an old technique taught to me by a friend who turns burls on a wood lathe, I de-barked the stump and let it dry out enough that it started to split a little around the sides. You then put it in a trashcan or any other watertight receptacle and put 100% anti-freeze (Ethelyene Glycol) in a couple of inches deep and keep it that way for a day or so. It will readily absorb the anti-freeze and unlike water, the anti-freeze causes a cellular change in the wood that will not dry out. The beauty of this process is that as the stump does dry out it will not split! Its amazing but true, now Elm is harder than Japanese arithmetic and generally resistant to splits but it will split, especially a de-barked piece. When one end has soaked a day in then solution, flip it end for end and give the other end equal time. Let it dry for a couple of weeks out in the yard with a couple of pieces of wood under it so air circulates, the stump will "Dry" out beautifully without waxing , shellacking or painting the ends. You may route it for the base of your anvil and rest confident that it will stay stable for many years. My friend when he was ready to turn bowls or vases would dry the wood out in the microwave, a big one and be danged if it did not remain stable throughout the entire process, turning, sanding and finishing. A pic is worth a thousand words so here goes...
Stump Long Term Anti-Split Protection "101" See the small split forming on the edge if you look closely, when I flip it end for end and add some more anti-freeze this thing will swell up like a fat ladies ankles after eating a box of saltines.
Enjoy
Jerry