Pottery: a large kiln, shown in elevations and sections. Engraving by Bénard after Lucotte. https://www.rawpixel.com/image/13971730/image-cross-pattern-public-domainFree Image from public domain licenseChemistry: many types of furnace, kiln, and oven. Engraving by E. Krausse. https://www.rawpixel.com/image/14010648/chemistry-many-types-furnace-kiln-and-oven-engraving-krausseFree Image from public domain license