Describes an insectary which is inexpensive and easily constructed of small blocks of wood with holes drilled in them. Suggests several areas for study which can be accomplished with the insectary. (SLH)

Mathematically analyzes the polarization of rainbows, a phenomenon which can be demonstrated in a laboratory simulation using polaroid sheets, perspex discs, and a white light source. (MLH)

Presents a brief description, including dates and estimated time of appearance, of a total eclipse of the moon. Suggested details for observing, requiring little or no experience or equipment, are presented. (EB)

Electrets, the electrical counterparts of magnets, are polarized dielectrics that are permanent on a scale of months. Describes procedures for making electrets out of plastic sheets like Mylar, for testing them and measuring their pole strengths, and for establishing necessary and sufficient demonstrations that they are not simply surface charged.…