Presents the procedures, results, and conclusions of a study designed to determine the relative effectiveness of 4 types of laboratory reports in CHEM Study chemistry. Subjects were 75 eleventh and twelfth grade students randomly assigned to four treatment groups. Dependent variables were the scores on a battery of evaluation instruments which…

Presented is a bench-top demonstration of heating/humidification designed to provide visual confirmation of psychrometric principles outlined in thermodynamics texts. Includes a schematic sketch of the heater/humidifier apparatus, discussion of the six steps involved during the demonstration, and a table of experimental results. (JN)

Described are some new uses and procedures of titration procedures. Topics included are titration in non-aqueous solvents, thermometric titration and catalytic methods for end-point detection, titration finish in organic elemental analysis, and sub-micro analysis and automatic titration procedures. (CS)

A method of estimating the solubilities of drugs in water is reported that is based on a principle applied in quantitative structure-activity relationships. This procedure involves correlation of partition coefficient values using the octanol/water system and aqueous solubility. (Author/MLW)

To help technically skilled deaf science students overcome their language limitations, an instructional module is described which uses cards displaying a laboratory report format along with grammar and style requirements. (CL)

Discusses issues raised by the English Health and Safety at Work Act, legislation regulating laboratory safety in industry and in schools in Great Britain. (SL)

Describes a laboratory teaching method that utilizes open-ended investigations that are meaningful and relevant, yet do not demand excessive amounts of the student's time. (MLH)

Presents design and construction details of a controlled temperature heat block. Includes information about the heater block, thermistor probe, circuit board, and the housing. (DDR)