The typical UV treatment device consists of a cylindrical chamber housing the UV bulb along its central axis. A quartz sleeve encases the bulb; water flow is parallel to the bulb, which requires electrical power. A flow-control device prevents the water from passing too quickly past the bulb, assuring appropriate radiation contact time with the flowing water. It has been reported that turbulent (agitated) water flow provides more complete exposure of organisms to UV radiation.
Addy Walker escapes a Southern plantation during the turbulent Civil War. Meet Addy as she and her mother make a daring journey from slavery to freedom in 1864. Addy's story is sure to engage young girls as they learn what it was like to be a girl during the Civil War. 59ce067264