Three different problems are given for student investigation in determining amino acid compositions, floral pigments, and water soluble amino acids by using the techniques of Roll Chromotography, DISC Chromotography, Thin Layer, and Paper Chromotography. (BR)

The use of a laboratory in which to teach social studies would greatly enrich the curriculum of this field. (CK)

The authors react to Chris Argyris' On the Future of Laboratory Education" by distilling and blending the modes of learning elaborated by Bruner. They apply Bruner's stages of understanding from the senses, to images, to symbols-- to laboratory training and praise the trainer who respects the complexity of individual growth. (Author)

Reports on the design and results of an effort to change the organization style of a sales unit in a business organization. (LN)

Describes the objectives and content of a freshman physics laboratory course designed to eliminate the cook-book type of experiments. Instead, students are encouraged to devise their own experimental designs, execute the experiments, and interpret the results in their own way. The authors report that student reaction to the course is generally…

The diffraction of a full thermal atomic potassium beam by a single slit was observed. Four experimental diffraction patterns were compared with that predicted by de Brogtie's hypothesis and simple scalar Fresnel diffraction theory. Possible reasons for the differences were discussed. (LC)