Data are presented from a Canadian study to show that the cost of laboratory testing is escalating and represents a sizable proportion of hospital costs. Policy interventions will require thorough analysis and will require sophisticated control programs at various levels in the laboratory inquiry system. (Author/MLW)

Presents an experiment which uses readily available starting materials and inexpensive equipment for synthesis of transition metal carbonyls at 1000 atm and which is intended to give students experience in techniques used in research and industry. Safety precautions are emphasized. (Author/SA)

A three-point linkage system in tomatoes is used to explain concepts of gene mapping, linking and statistical analysis. The system is designed for teaching the effective use of statistics, and the power of genetic analysis from statistical analysis of phenotypic ratios. (Author/SA)

Describes the process dynamics and control program developed by the chemical engineering department at the University of California, Santa Barbara. Undergraduate and graduate control courses and real-time computing courses are included. (HM)

Describes a technique for the laboratory culture of Eucyclops agilis using Euglena. Details of the life cycle are given, and suggestions for its use in laboratory practicals, and in investigations with sixth-form (16 to 18 year-olds) and college students in the United Kingdom. (Author/HM)

This inexpensive but informative experiment for undergraduate biochemistry students involves isolating phosphatidyl choline from spinach leaves. Emphasis is on introducing students to techniques of lipid extraction, separation of lipids, identification using thin layer chromatography, and identification of fatty acids. Three periods of three hours…

Described is a solar science activity designed to show students how light energy can be directed to produce visible chemical changes by making sunprints. Included are the materials, procedure, and safety considerations. (KR)

Described is a demonstration which involves the ingrowth of members of the radon-222 decay series. Laboratory procedures, equipment, analysis, and results are discussed. (CW)

Described is a simple and interesting chromatography experiment using three different fluorescence detection principles for the determination of caffeine, saccharin and sodium benzoate in beverages. Experimental procedures and an analysis and discussion of the results are included. (CW)

Considered is an experiment used to investigate one-dimensional, nonuniform acceleration. Presented is the correct expression for the acceleration, generalized to include friction and describe simulations supporting student data. The feasibility of the experiment is questioned. (CW)

The use of computer spreadsheet programs in the physics laboratory is discussed. An example of this application with a conservation of energy laboratory is presented including the cases of a rolling sphere and a sliding sphere. (CW)

Presented is an experiment which can be used in a first-year chemistry class to introduce the synthesis and analysis of compounds. Described are the experimental procedures, sample data, analysis, and discussion. (CW)

Proposed are preparation methods of the active and inactive forms of Cosalen. An experiment of heterogeneous kinetics that consists of following the time dependence of the oxygenation of the active solid and measuring the oxygenation capacity of the chelate is described. (CW)

Described is a case, a heterocyclic sulfoxide, which is useful for an introduction to first-order four-spin data analysis. Background of this technique for use with undergraduate students is given including a sample analysis, a list of supplementary materials, and experimental procedures. (CW)

Described are the basic materials and procedures used to study defensive burying behavior and suggested laboratory projects. Discusses live targets, non-living targets, social variables, and previous experiences of the subjects. (CW)