A new scale is suggested, with the objective of simplifying relationships between the various scales and units used in spectroscopy. Although there are certain drawbacks to such a scale, it is hoped that the suggestion will stimulate discussion on the relevance of the many scales and units that are used. (Author/BB)

Data from this study suggest that evaluations of long-term accumulations of students' laboratory analyses should be standard procedure to detect deviations from the accepted true assays. Efforts are recommended to determine the cause of the error and the implications or grading procedures reconsidered. (Author/MA)

Data reveal that the absorption spectra of alkali metals can be analyzed using a modified laboratory procedure. ( CP)

Describes the laboratory procedure to be used for an effective demonstration of aldol condensation. (CP)

Reviews the use of a programmable hand-held calculator for evaluating a student's performance on a quantitative laboratory experiment. (SL)

Brief suggestions on science laboratory and classroom labor-saving techniques are provided. (CP)

Describes a freshman level physics laboratory course which includes elements of mathematical statistics. (SL)

Describes physics laboratory equipment including: circuit improvements for an electronic counter-timer, a commercial counter-timer-frequency meter, and a device for demonstrating resonating air columns. (SL)

Reviews safety practices for undergraduate organic chemistry laboratories. (SL)

Describes a class of ion-selective electrodes that use a solid-state sensing membrane. These are suitable for student activities. (SL)

Presents a method of teaching advanced physics laboratories which simulates research conditions and requires students to make researchlike decisions. (SL)

Describes the inception, use, and evaluation of a demonstration laboratory designed to enable first-year university students to observe physical phenomena that they did not observe in the secondary school. (Author/SL)

Described is the life cycle of the cellular slime molds Acrasiales. Experiments that can be used to explore the aggregation, migration, and culmination activities of the organism are suggested. Laboratory procedures for culturing these slime molds and listings of biological supply houses and literature references are also given. (MA)

Argues that using outdoor classrooms to examine environmental studies will help heighten the student's awareness of the importance of protecting our environment. Describes how such a land laboratory could be developed. (RKM)

Offers suggestions and outlines ten easy steps for assuring a safer science classroom environment. Includes such recommendations as: scheduling a safety inspection; displaying safety posters; enforcing a laboratory dress code; establishing a safety reference library; and updating safety report forms and procedures. (ML)