Describes differences in the construction of a colorimeter and a photometer. Gives examples of ways in which light-measuring instruments can be used by biologists. These examples can be used either as class experiments or as individual projects. (GS)

Describes laboratory procedures for culturing drosophila and for observing their behavior. Outlines drosophila response to stimuli and explains the courtship sequence. (GS)

Presents an aural comprehension exercise (French) for the language laboratory, which has been undergoing try-out at the Romance Language Seminar of the University of Berlin since the summer semester of 1973. Basic to the concept of this exercise is the combining of oral training and area study. (Text is in German.) (IFS/WGA)

Describes an inexpensive program that has demonstrated success in increasing social skills. A student project in a school of social work brought about changes both in attitude and behavior in widely diverse groups. (Author)

A course in Life Support Systems that has been adapted to increased class size is described. The curriculum includes lectures, seminars, laboratory demonstrations and operating room and intensive care rounds to introduce the student to life support concepts. (Author/PG)

this article presents a way to stimulate the study of some properties of numbers. The number of points on the star to be drawn is predicted using the number of teeth on each wheel, the greatest common factor of those numbers, and the number of teeth in the movable wheel. (Author/KM)

Describes two methods for the direct observation of soil-dwelling micro-organisms. One method is for relatively dry habitats and the second, for permanently wet habitats. (GS)

Describes an approach which emphasizes the physical aspects of periodic phenomena, and is explicit about whether the time or space domain is being treated. (Author/GS)

The author describes a model for operations on the set of rationals. Thi s model, used by students in a laboratory situation, is based on an easily constructed number balance. (SD)

Describes a chemistry curriculum for college freshmen that uses laboratory study of the chemical composition of meals eaten by students as the central activity from which theoretical and practical learning are derived. Presents a meal analysis flow diagram and a table of concepts included in the program. (GS)

Describes the inexpensive construction of an uptake volume potometer uptake and loss potometer, and experiments on plants that can be conducted with the equipment. (BR)

This article describes a tree project undertaken by a class of 5- to 7-year-old children in the Child Study Centre at the University of Alberta. Following a description of the school and the children, the article discusses how the project evolved and discusses the three phases of the project. Photographs taken during the project are included.

A reaction kinetics experiment for the chemical engineering undergraduate laboratory course was developed in which in-situ Fourier Transfer Infrared spectroscopy was used to measure reactant and product concentrations. The kinetics of the hydrolysis of acetic anhydride was determined by experiments carried out in a batch reactor. The results…