Raised oven floor
Part of a kiln, also called false
floor. The raised oven
floor covered the combustion chamber and upon it
vessels or other ware to be burnt
was stacked for firing. It was built of portable
components such as bars, positioned at
certain intervals, but also of solid clay perforated
with vent-holes. In both cases hot air coming from the
combustion chamber was able enter the oven.
Relaxation time
The time in which the remanent
magnetisation
decreases by 1/e (e = Euler number) of its initial
value.
Remanence - remanent
magnetisation
Partial persistence of a phenomenon after
disappearance of its cause. Remanent magnetisation of
a material is the magnetisation
that remains after removal of the inducing magnetic field. See also magnetisation.
Roman period
Period of the Roman supremacy in Europe and the Mediterranean,
lasting from 27 BC until 378 AD.