Described is a new approach to investigative physiology based on computerized transaxial tomography, in which visualization and measurement of the internal structure of the cardiopulmonary system is possible without postmortem, biopsy, or vivisection procedures. Examples are given for application of the Dynamic Spatial Reconstructor (DSR). (CS)

A set of instructions for growing algae successfully in the classroom and maintaining the culture is provided. Aids for identification of freshwater organisms are suggested. (SA)

Reviews the purposes of laboratory instruction as they were perceived in the literature from 1865 to the present. The paper is divided into three sections based upon the main influences on chemistry instruction: the university community, economic conditions, and technological development. Future trends in science education are also discussed. (CS)

Describes a circuit designed to measure time-of-flight velocity and shows how to use it to determine bullet velocity in connection with the ballistic pendulum demonstration of momentum conservation. (Author/GA)

Assesses the educational state-of-the-art regarding physiological simulation. States the importance of conventional physiology laboratory exercises involving living material. (MA)

This series of articles is intended to give vocational agriculture teachers familiarity with the areas of professional liability, basic guidelines to follow to limit liability, and knowledge of the basic legal terminology. (SK)

A number of classroom environmental experiences are presented: indoor and outdoor listening, observation, classification, vocabulary, and role playing. The experiences are outside the realm of science and are adaptable to various grade levels. (Author/SJL)

Describes an advanced laboratory experiment that introduces two important reactions in organophosphorous chemistry, the Arbuzov and the Atherton-Todd reactions. (CS)

Provides information concerning self-acceleration and self-inhibition phenomena and a description of an experiment in alkane pyrolysis that exemplifies these phenomena. (CS)

Describes an experiment used to study dielectric properties of materials. Values of the dielectric loss tangent can be determined at low frequencies from Lissajous figures formed on an oscilloscope. Some mineral rock specimens show Debye-type relaxation peaks at frequencies in the region of 1 to 500 Hz. (Author/DS)

Reviews the historical development of thermometry and the origins of the Fahrenheit and Celsius temberature scales. (CS)

A study was conducted to determine the extent to which departments of industrial education are offering courses which assist students in becoming technologically literate. Two types of classes are being offered: (1) technology as a discipline and (2) the tools, materials, and processes of industry, but general courses were not widely available.…

Argues that laboratory schools go awry because their goals and purposes are not clear. Underscores the major difficulties and hazards bearing upon laboratory schools: problems of function, differing values, and external and internal support. Proposes constructing or re-creating these schools through dynamic, forward-looking, inquiry-sustaining…

Discusses some examples of Fresnel diffraction. Diffraction effects caused by round holes, round obstacles, narrow slits, narrow obstacles, and transparent obstacles are included. (HM)

Presents computer assisted instruction (CAI) applications involving prelab simulations of organic chemistry experiments in advance of performing the actual experiments. Tables present the PLATO lessons used in the laboratory; and a comparison of average times for students to complete laboratories with and without the PLATO system. (CS)