An atomic absorption spectrophotometric method is described for the rapid analysis of lead dioxide candles exposed to ambient air containing sulfurous pollutants. (Editor/JR)

The study was conducted to evaluate divergent physics laboratories in accomplishing objectives of Commission on College Physics. A questionnaire was used to collect data from students. Analysis revealed students in divergent laboratories had more opportunity to choose or design their own experiments and develop a model for data interpretation. (PS)

Describes the principles and uses of thermoluminescence technique in dating of pottery and ceramic pieces and establishing the authenticity of artifacts. (CC)

Describes a microbiological experiment designed to study the competition between two species of bacteria. Experimental procedures and data obtained in conducting this experiment are provided, together with a discussion of the results. (JR)

Describes the commercial applications of hydroponics, and then outlines ways in which this soilless plant culture method can be used in the science classroom and laboratory. Gives directions for making a suitable growth solution, and suggests appropriate student experiments involving hydroponics. (JR)

Describes a surgical technique for performing pinealectomics, applicable to classroom and laboratory studies, by using a head-holding device for small animals and a flat dissecting tray outfitted with holding straps for larger animals. (CC)

Specific mathematics lab activities involving fractions and measurement at the seventh grade level are described. (DT)

Measuring activities using the metric system are suggested for the elementary level. (DT)