Recommends that teacher and student be provided with the broadest possible spectrum of meaningful and feasible experiments in which the comfort of the experimental animal is protected by the design of the experiment. (BR)

Instructions for observing the Solar Eclipse on Saturday, March 7, 1970, which will be total along a strip about 85 miles wide along the Atlantic Seaboard. Safety precautions and how to construct a pinhole camera to observe eclipse. (BR)

Presents the two positions of the geological debate, as presented in 1796, between the Wernerians (uniformitarians) and the Huttonians (catastrophic supporters). Presentations stress importance of earth heat, the origin of granite and basalt, and the cyclic theme of Hutton's earth. (RR)

The concept of the cell is taught with the aid of fruit embedded in gelatin. (CP)

The most economical means of extracting salt from a salt mine is posed as a simulation problem for middle school students. (CP)

In the science curriculum, use of a cemetery offers unlimited potential for developing the skills of collection, collation, and interpretation of qualitative and quantitative data." (Author)