Six short papers are presented on analytical chemistry in an integrated laboratory sequence, analytical chemistry at a junior college, the sophomore level analytical laboratory, the analytical textbook situation, and graduate level analytical chemistry. (BB)

A gas pressure gauge has been constructed for use in a student experiment involving the law of atmospheres. From pressure data obtained at selected elevations the average mass of air molecules is determined and compared to that calculated from the molecular weights and percentages of constituents to the air. (Author/BB)

Describes a simple method for establishing the end point in a volumetric analysis that will save time, and reduce both the titration error and the required amount of reagents. (GA)

Describes a synthesis of chrysanthemic acid which has been used successfully in a laboratory course. (Author/CP)

Reports on an undergraduate laboratory course designed to provide instruction and practice in the intellectual skills of application, analysis, and synthesis, and in Piaget's formal operations. A 10-item exam used to measure these skills is included as an appendix. (Author/CP)

Describes the use of nuclear magnetic resonance (NMR) spectroscopy to study a three-component system and the technique by which to define a ternary phase diagram. (CP)

Describes a series of polarography experiments using commercially available pulse polarography instruments. (SL)

Product noise ratings for a number of laboratory air blowers are reported and several recommendations for reducing laboratory noise from air blowers are given. Relevant noise ratings and methods for measuring noise emission of appliances are discussed. (BB)

Provides demonstrations using digital display instruments of some of the mass and pH-related topics covered in first-year chemistry courses. (CP)

Reviews several schemes for organizing science laboratory objectives and activities and for analyzing several techniques designed to measure these laboratory outcomes. The need for further study and analysis of psychomotor behaviors in science education is emphasized. (HM)

The co-leader dyad can be viewed as a small group in its own right, developing over time. The purpose of this paper is to propose a model of some of these developmental changes in member expectations, co-leader responses, and the co-leaders' relationship with each other. (Author/NG)

Experimental procedures for studying enzyme activity using a Spectronic 20 spectrophotometer are described. The experiments demonstrate the effect of pH, temperature, and inhibitors on enzyme activity and allow the determination of Km, Vmax, and Kcat. These procedures are designed for teaching large lower-level biochemistry classes. (MR)

A quick, sensitive method which is adaptable for quantitating periodate consumption in a variety of undergraduate laboratory contexts is described. A laboratory procedure is also given that may be used for measurements of reaction rates as a function of temperature. (MR)

Laboratory techniques and teaching methods on applied biology topics are described. (CP)

Provides contributed suggestions in applied topics of secondary school physics. Entries include notes on instructional materials, methodology and laboratory techniques. (CP)