The purpose of this paper is to present five new devices that demonstrate a variety of flow phenomena in liquids and granular materials that exhibit fluid-like behavior. These devices complement and add on to a recent collection of demonstrations that was published in this journal. The devices are self-contained and portable, and can be utilized…

A construction of a simple gas apparatus that can be made by students either in the laboratory or the classroom, is presented. The components needed to construct the apparatus are disposable polythene pipets and polypropene microcentrifuge tubes.

Describes an undergraduate laboratory project that combines microprocessor programing, interfacing, and system design to produce an inexpensive multichannel analyzer. (Author/CS)

Describes a method to detect the presence of microgram quantities of nearly any metal in samples of alloys, minerals, water, and air. This chemical-spot testing technique requires no elaborate equipment and can be done by an amateur. (SK)

Explains the principle upon which a barometer operates. Describes how to construct two barometric devices for use in the classroom that show air's changing pressure. Cites some conditions for predicting weather. (RT)

Reviews a science open house held at regular intervals at Yuba College, California. Enumerates the motivation for and the organization of the open house. Reports community wide attendance and participation. Lists the exhibits used at the open house with descriptions. (CW)