Describes the processes involved in clinical urinalysis and relates them to possible high school biology classroom uses. (CS)

Outlines advantages derived from constructing and using a Projectable Basic Electronics Kit and provides: (1) list of components; (2) diagrams of 10 finished components (resistor; capacitor; diode; switch; bulb; transistor; meter; variable capacitor; coil; connecting terminal); and (3) diode and transistor activities. (JN)

Examines hydraulic jumps and suggests several simple experiments which can be carried out with limited equipment. (DS)

Briefly described are 25 "hands on" classroom activities which require live, freshly killed, or preserved grasshoppers. Topics of activities include predator-prey relationships, feeding habits, locomotion, dissection, anatomy, and population estimates. (DS)

Discusses theory of the rotating mirror, its use in measuring the velocity of the electrical signal in wires, and the velocity of light. Concludes with a description of the manometric flame apparatus developed for analyzing sound waves. (SK)

An Osmette A model 5002 automatic osmometer is used to characterize different drugs, diluents, and adulterants commonly encountered in samples of forensic interest, permitting rapid determinations with good reproducibility and use by large numbers of students with little training. Includes background information, procedures, and typical students…

Presents content information and/or laboratory procedures and experiments on different biology topics including small-scale cultivation of watercress and its use in water-culture experiments, microbiology of the phylloplane, use of mouthbrooders in science class, and the gene. (DC)

Suggests the use of simple testable problems to motivate middle school students to plan and carry out their own experiments, thus reinforcing integrated process skills. Lists several sample problems. (DS)

Provides instructions for constructing a model of a working thermostat and suggests several student activities using the model. (DS)

Discusses the problem of ellipticity in the motion of the ordinary Foucault pendulum and the error caused by it. Presents a simple method of slightly modifying the force-displacement relation in such a way that precession does not result from ellipticity. (Author/SK)

Discusses how the concept of organoleptic chemistry permeates every modern chemical experiment. Six approaches for developing organoleptic attitudes which are crucial to the experimental aspects are also presented. (HM)

Discusses the nature of light-producing reactions and provides a procedure for demonstrating chemical luminescence using siloxene indicator. Indicates source of this chemical and safety precautions. (SK)

Describes an interactive BASIC program with 192 statements and 18 comments for use with a Tektronix 4051 computer. (SK)

Briefly describes the application of thermodynamics (system at equilibrium) to the study of the extraction of metals from their oxides (dynamic situation). It is more relevant to study the temperature variation of the equilibrium constants of the reaction than to study the free energy approach. (Author/SK)

Presents an experiment to illustrate mechanical resonance designed for use in lower division laboratories. The apparatus and procedure have been kept simple. The basic experiment yields measurements of amplitude versus driving frequency, but a fairly simple elaboration allows for measurements of phase lag as well. (Author/SK)