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2An apartment is built similar to a laconicum, plastered with marble stucco, and polished. In front of it is built a furnace, which communicates with the laconicum; the mouth of this is to be very carefully closed, for the purpose of preventing the escape of the flame. Resin is then placed in the furnace, whose smoke, when the material is set on fire, passes by means of communications into the laconicum, and therein adheres to the walls and the arched ceiling. It is then collected, and some part of it is tempered with gum, to make ink for transcribers; the remainder is used by stuccoers in colouring walls, being previously mixed with size.
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