Presented are lists of deshielding constants chosen to be easy to remember and to given estimates close enough to measured shifts to allow interpretation of the spectrum of a compound of known structure. (BT)

Describes an undergraduate physical chemistry experiment which demonstrates the principles of solution calorimetry and the entropy titration technique. (CS)

Discusses the confusion that results from differences among various labels used in developmental and basic education programs. Proposes clarification of such terms as "center,""lab,""individualized," and "clinic" and suggests definitions for proper usage. (DR)

This column generally relates errors which have been discovered in textbooks. The error discussed in this issue is the prevalence of erroneous ideas in organic chemistry textbooks, related to the chemistry of sodium borohydride. (Author/SA)

A description is given of the Science Shuttle program which uses a van to bring computers (Apple II) into the classroom. (MK)

Discusses the state of the early universe based upon deductions from current observations. (SA)

The use of biological examples in teaching applications of the analog computer is discussed and several examples from mathematical ecology, enzyme kinetics, and tracer dynamics are described. (Author/GA)

Describes two laboratory courses in electronics designed for nonscience students. The courses require no prerequisites in physics or in mathematics, and emphasis is put on the laboratory aspect of electronics, such as building and testing various electronic circuits. (GA)

Suggests ways in which language laboratory technicians and language department faculty can cooperate to integrate the foreign language curriculum and laboratory use. (AM)

Describes a two-hour physics laboratory experiment modeling the phenomena of eclipsing binary stars developed by the Air Force Academy as part of a week-long laboratory-oriented experience for visiting high school students. (BT)

This is the fourth in a series of articles concerned with safety in school science. This article presents some facts about eight types of carcinogenic chemicals and suggests precautions in their use in British schools. A safety bibliography is also included. (HM)

Explains interference colors in thin films as being due to the removal, or considerable reduction, of a certain color by destructive inteference that results in the complementary color being seen. (GA)

An experiment is presented which utilizes the current solid state technology to demonstrate electrochemical generation of hydrogen gas, direct generation of electricity for pumping water, and energy conversion efficiency. The experimental module costs about $100 and can be used repeatedly. (BB)

The preparation of eight heterocyclic compounds is described. These syntheses each take three or four hours and are suitable for undergraduate organic chemistry laboratories. (BB)

This undergraduate experiment demonstrates the effect of temperature on the rate of hydrolysis of para-nitrophenyl beta-glucoside. (BB)