For the determination of the amount of carbon residue left after evaporation and pyrolysis of an oil, and is intended to provide some indication of relative coke-forming propensities

LPG-heated by Meker lamp fitted with safety valve. Insulating ring block, metal tripod holder with Nichrome triangle, stainless steel chimney. Inner porcelain crucible, middle iron crucible fitted with Skidmore lid and external iron crucible fitted with lid.