Discusses the major constituents present in natural bodies of water, how these substances are analytically determined, and the chemical reactions of the various species in solution. (MLH)

Students enrolled in an introductory, audio-tutorial biology course were randomly assigned to either the control group, which followed the regular program and took pre and posttests designed for this study, or to the experimental group, which followed an identical program with additional exercises specially designed to teach higher cognitive…

Describes how manpower needs due to recent technological developments have stimulated engineering technology programs. Also describes how various technical and professional societies of the engineering profession have expanded their structure to include engineering technology. (MLH)

Describes the evaluation of engineering technology programs and the problems faced by the engineering technology graduate. Asserts that the "identity crisis" developing in the engineering community between the engineer and the engineering technologist could be averted if positive steps are taken to spell out the differences between the two. (MLH)

Describes a restructuring program that places more emphasis on blending research and teaching at the practical level. Heavier emphasis will be placed on engineering and additional consideration given to environmental technology, economics, business, and law. (GS)

Describes a laboratory experiment on geometrical optics designed for life science majors in a noncalculus introductory physics course. The thin lens equation is used by the students to calculate the focal length of the lens necessary to correct a myopic condition in an optical bench simulation of a human eye. (Author/MLH)

Discusses the principle of operation of phase-sensitive amplifiers. Gives three examples, suitable for undergraduate laboratory use, of the use of phase-sensitive, or "lock-in" amplifiers. Concludes with a description of an inexpensive lock-in amplifier which has an overall voltage gain of 1000. (Author/MLH)

Presents information on a centrifugal force apparatus, signal averaging with a minicomputer, and the use of an air track. (MLH)

Reports on a one day conference on experimental physics in school and university. States opinions of some of the participants who felt that practical rather than theoretical work should be stressed. (CP)

Describes the steps in writing a computer program to solve radioactive decay problems by a digital method. (CP)

Discusses solutions to problems in higher chemical education, including establishing a culturally oriented first course in chemistry, increasing employment opportunities for students, restructuring graduate education, and restoring the balance of professional effort between research and teaching. (MLH)