Describes the use of nuclear magnetic resonance (NMR) spectroscopy to study a three-component system and the technique by which to define a ternary phase diagram. (CP)

Describes an experiment for estimating molecular size and Avogadro's number. Uses the diffusion length of iodine in air at 100 degrees Celsius as a function of time, and the change in volume of a small quantity of carbon dioxide as it goes from the solid to the gaseous state. (GA)

A series of 13 experiments employing mice systematically investigated shock-elicited activity in a circular field and escape performance in a shuttle box following exposure to either escapable or inescapable shock. Results show that escape interference induced by inescapable shock may be comfortably interpreted in terms of a decreased tendency for…

In a series of experiments, it was found that asking questions about information in a prose sequence while it is being presented can affect the degree to which that prose material is stored as a unitized whole, and that this in turn will affect how well that prose is remembered. (Editor)

Suggests a series of science activities in botany for the elementary school classroom. Contains suggestions on the care and propagation of the coleus plant. (CP)

Describes the apparatus and procedures for constructing simple AM radio circuits with a minimum of electronic components. (SL)

Describes the apparatus and procedures for conducting a simple speed of light experiment in an average laboratory using a laser source, a rotating mirror, and an oscilloscope. (SL)

Provides demonstrations using digital display instruments of some of the mass and pH-related topics covered in first-year chemistry courses. (CP)

Explains the theory and laboratory construction procedures of a positive photoresist. (CP)

Describes a laboratory procedure which does not demand sophisticated equipment. (CP)

Reviews several schemes for organizing science laboratory objectives and activities and for analyzing several techniques designed to measure these laboratory outcomes. The need for further study and analysis of psychomotor behaviors in science education is emphasized. (HM)

Light-emitting diodes (LEDs) are described and three classroom experiments are given, one to prove the, low power requirements and efficiency of LEDs, an LED on-off detector circuit, and the third an LED photoelectric smoke detector. (BB)

The authors maintain that an interdisciplinary approach to health and science education can encourage dialogue between citizens, government, and the scientific community. They describe the Elementary Science Study (ESS) curriculum, which integrates health and science education through classroom experimentation. (Author/DS)

Tests the egocentric hypothesis, i.e., if it can be shown that, given spatial cues, an infant searches at a position bearing an invariant relation to these cues, but with a varying egocentric position, then there would be strong evidence that his organization of space is not necessarily egocentric. (Author/RK)

Two experiments investigated serial recall with eight-word lists in which the frequency rating of the terminal word was manipulated. The effect on recall of two kinds of verbal "stimulus suffix" as well as a control noise suffix was also tested. Recall for the terminal items in the lists was analyzed. (Editor)