Each placed bag should be tamped and flattened to improve the seal. The students also hand tamped over a hundred layers of soil. By the mid-1990s, though, Roth tamped down on the self-referentiality. Each course is tamped after it is laid. With its tamped clay floor it was the working room of the farmhouse. The wall was initially built solely from tamped earth. The tube is then removed, and the hole tamped. The paper is then tamped into the engravings on the stone. The civil war headed by Dawson Kalliam has been tamped down. When tamped or untamped, it has a density of 1.14 g/cm or 0.98 g/cm respectively.