Describes some science apparatus: included are a gene kit to demonstrate aspects of population genetics and selection, an electronic thermometer for use in the field of environmental studies, an astrobrella to use in astronomy classes, and crystal display models of different substances for chemistry classes. (GA)

Details a laboratory experiment designed to extend the calcium PVC matrix membrane ion-selective electrode studies to complex formation equilibria. (Author/MA)

Reviewed are a number of factors important in the formation of trihalomethanes (THM) including the nature of aquatic humus and the influences of preozonation, bromide, pH, and chlorine. A brief investigation is also conducted into the kinetics of the THM reaction. Several major research needs are represented. (CS)

The method involves the dissolution of a small piece of metallic lithium in a small quantity of tertiary alcohol followed by addition to a mixture of the isocyanate and the tertiary alcohol in ether. This should be useful in organic chemistry laboratory courses for the identification of tertiary alcohols. (Author/BB)

The preparation of "p"-carboxystyrene from carboxybenzyl bromide in aqueous media is described. This is an example of a Wittig procedure that can be performed by students in one afternoon. (BB)

The Meerwein reaction is often omitted from undergraduate organic chemistry laboratory books. This experiment, the preparation of "o"-chlorocinnamic acid from "o"-chloroanaline, illustrates this section. (BB)

This safe and efficient procedure for the synthesis of N-substituted amides and hydrazides is a modification of the Schotten-Bausmann procedure in which the amine or hydrazide is replaced by the corresponding hydrochloride salt, and the use of alkali is eliminated. (Author/BB)

Describes the sequence of planning activities for the Buffalo, New York, Writing Place Project workshop and inservices, concentrating on the steps necessary to make a writing laboratory a reality. (DD)

Describes how to construct a simple on-axis hologram designed to illustrate the reconstruction of images in terms of Fresnel zone plates and gratings. (GA)

Describes the operation and use of the scanning electron microscope as an important tool for ocean scientists. Numerous electron micrographs are included. (MA)

Reviews recent developments in the fields of ultraviolet lasers and rare gas lasers. (SL)

Most children have visited a city even if they don't live in one. Build on your students' city experience through a learning center. Here are some activities that will help city children visualize the geographic location of their neighborhoods within the city while they learn language and math skills and about social studies and art activities.…

The experiment described was developed for the third-year course in inorganic and analytical pharmaceutical chemistry to provide students with "hands-on" experience with high pressure liquid chromatography. Assay procedures are given along with experimental parameters and student results. (LBH)

Describes a simple self-quenching super-regenerative nuclear quadrupole resonance (NQR) spectrometer. (SL)