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)

Explains the use of the multiple attribute model in investigating and monitoring communication programs. See CS 703 555 for availability. (MH)

The ICD Research Utilization Laboratory received a five-year RSA grant in 1970 to act as a catalytic interface between research and practice for the rehabilitation of special client populations. The present thrust is to demonstrate how management practices can be improved in programs for vocationally vulnerable populations. This article describes…

Describes chemical labeling standards that utilize explanatory symbols to identify hazardous substances. (MLH)

Five brief items are discussed. They include (1) preservation of reactive ions in solid solution, (2) the molecular partition function, (3) purification of methoxychlor, (4) a kinetics experiment, and (5) determining molecular weights of acids. (RWH)