1680. (The light in the rotunda was like a living flame rising to a considerable height. They informed me that it was not a burning, but only a shining, fire, and that they have such species of woods among them as when cut and disposed on the hearth diffuse around them a kind of lucid flame. In lucidity and color it resembled our flame, so that I took it to have been a burning flame, which gave light to the whole chamber. Two pieces of wood were represented to me in which there was this kind of light. The appearance was as if they formed a fire of coals, or as if there were a mere fiery something glowing within, and which shone through. Such sticks of wood are cut and placed upon the hearth, and from them the luminousness originates.)