Describes a modified version of an experiment found in the laboratory manual "Chemistry" by Masterton, Slowinski, and Wolford (Holt, Rinehart and Winston, 1980). Accurate results (normally less than four percent error) in less time were achieved when magnesium turnings were used instead of magnesium ribbon called for in the original experiment.…

Describes urinalysis techniques for dry weight measurement, examination of urinary calculi (stones), and determination of the presence of blood and blood pigments. Also presented are directions for preparing required reagents. (WB)

Discusses an attempt to have students learn chemistry by conducting and discussing laboratory experiments in small groups largely independent of the teacher. The project results and the 30 experiments that student groups conducted are described. (WB)