Niklas:

Bell refers to the Osmund furnace as being in Sweden. And his whole book is about iron production at lower costs and faster production rates. But just like the term "Osmund furnace" in one sentence turns into volumes of research because he may have known of what he was referring to, but he was a little lax in his descriptions. It will take a little bit to process your info. What as the name, German or Swedish, of the German hearth?

Kind Regards,

Raimey
rse