Recommends black chalkboards, wet-washed before every lecture and advocates the use of Railroad Crayon chalk because its softness and larger size result in a wide high-intensity line. The resulting contrast improves the visibility of material written on chalkboards. (Source for the chalk is provided.) (JM)

Reports on a portable video color camera that is fully suited for seeing ultraviolet images and offers some expanded viewing possibilities. Discusses the basic technique, specialized viewing, and the instructional value of this system of viewing reflectance patterns of flowers and insects that are invisible to the unaided eye. (CW)