Describes an undergraduate physical chemistry experiment in which a low cost spectrofluorimeter is used to carry out elementary emission measurements on a transition metal complex. The students measure uncorrected emission and excitation spectra, and determine the rate constant for an exceedingly fast bimolecular reaction, the deactivation of an…

Problems in the experimental laboratory in scientific research are discussed and solutions are proposed for the problem of conflicts between the experimental model and reality. As a possible beginning for change, an apparatus is suggested to replace the tachistoscope. (SCC)

An undergraduate experiment is described which employs a relaxation method for the measurement of the thermal conductivity and specific heat of a metallic sample in a temperature range of 0-100 degrees centigrade. (Author/CP)

A series of activities involving comparing weights of objects directly, using non-standard units, using standard units, using simple scales, and using complex scales are described. (SD)

Instructions are provided for the construction of 4.5 foot diameter planetarium shells. (CP)

Describes a rocket propulsion demonstration utilizing a child's wagon and a carbon dioxide fire extinguisher. (CP)

Describes the separation of proteins from bovine serum and egg-white using carboxymethyl cellulose, Vistec C1. Explains the preparative work that is essential before the technique can be employed. (GS)

How the criticism of a teacher led to the improvement of his experimental psychology course and a symposium on teaching experimental psychology. (Author/DE)

Activities involving the drawing of kites and figures related to kites are described. (SD)

Describes an experiment which measures the surface tension of a liquid and illustrates interfacial spreading and the Marangoni effect. (MLH)

Describes an experiment in which the iron content of a commercial vitamin tablet is determined by comparing its visible spectrum to the visible spectrum of a standardized iron solution. (MLH)