Presents a criminalistics laboratory experiment of benzidine rearrangement and the detection of trace quantities of blood which does not utilize carcinogens. (SL)

Describes an advanced physical or inorganic chemistry experiment in determining the rate law of chemical reactions which demonstrates unusual behavior of k-obs. (SL)

Describes an introductory photochemistry experiment using the ohotohydration of pyridine in aqueous solutions to illustrate many physical aspects of photochemistry. (SL)

Describes a demonstration concerning the air pollution aspects of gasoline vapor which provides an estimation of the vapor pressure of test fuel, the molecular weight of the vapor, and illustrates a method of controlling the pollution. (SL)

Describes the use of a transparent rectangular box with transparent spheres to demonstrate the three dimension basic concepts of close packing. (SL)

Describes results of a cost analysis study of the organic chemistry laboratory and presents simple ways of cutting costs by recycling or decreasing quantities of reagents used in experiments. (SL)

Describes the use of inexpensive polarimeters in laboratory experiments for general chemistry courses. (SL)

A brief discussion of a comparatively large-scale enquiry into attitudes of British students toward the language laboratory. Generally they felt it improved their speech production but had minimal effect on their writing skills. Some of the questions used in the survey are included. (AMH)

Describes a device for measuring the absorption of radiation for a quantitative analysis chemistry laboratory course. (SL)

Describes a simple experiment to verify the reflectivity equations of Fresnel and for measurement of optical constants. (SL)

Addresses the concern and need for teaching safety and safety practices to students. (SL)

Describes an experimental verification of Stefan's law using commercial electric lamps. (SL)

Describes a freshman level laboratory course for physics or engineering students that introduces the various quantities determining the motion of compound pendulum systems. (SL)

Describes procedures to demonstrate oxidation and simultaneous equilibria involving insoluble salts. (SL)

If we are to enhance the benefits of schooling, attention must be paid to the earliest years--BEFORE--and to the possibilities for on-going later development--AFTER. (Editor)