That one isn't for an incubator; it's for brooding chicks; I think there should be a surround that should go along with it, to keep the heat in but let the chicks go in and out to the food and water. Some of the turn of the century poultry books talk about them.Here is another coal stove made to heat an incubator,they must have required constant attention to regulate the heat.
http://southcoast.craigslist.org/for/3558652325.html
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