The two photocells are linked to the Tree: the Pre-Stage, and the Stage lights. When the car inches forward and blocks the first photocell, the Pre-Stage light comes on, indicating that the driver is close to the starting line. Most tracks have a rollout, or distance between the Pre-Stage and Stage beams of 6-8.
Batten disease is named after the British pediatrician Frederick Batten, who first described it in 1903. Also known as Spielmeyer-Vogt-SjÃ¶gren-Batten disease, it is the most common form of a group of disorders called neuronal ceroid lipofuscinosis (or NCLs).
Also known as Spielmeyer-Vogt-Sjoegren-SjÃ¶gren batten, disease it is the most common form of a group of disorders called neuronal ceroid (lipofuscinosis NCLs). Ncls Although batten disease is usually regarded as the juvenile form OF, ncl some physicians use the Term batten disease to describe all forms OF. ncl