Presents some solutions to problems commonly encountered in maintaining a classroom aquarium: pH control, overfeeding, overcrowding of tank populations, incorrect temperature settings, faulty introduction of fish into the tank, and the buildup of too many nitrogenous wastes. (PB)

This training manual presents material on the theoretical concepts involved in the methods listed in the Federal Register as approved for determination of trace metals. Emphasis is on laboratory operations. This course is intended for chemists and technicians with little or no experience in analytical methods for trace metals. Students should have…

In order to serve college administrators, architects and physics educators, a collection was made of material reflecting the state-of-the-art of physics building design. This body of material, including drawings, diagrams, and photographs, resulted largely from extensive interviews with about 50 institutions who had recently built such facilities.…

The entire issue is a list of laboratory instruments and equipment and the names and addresses of their manufacturers. Names of instruments appear in alphabetical order; names of manufacturers of each instrument appear below each instrument entry. The complete name, address, and telephone number of each manufacturer are found in a separate section…

The entire issue is a list of laboratory instruments and equipment and the names and addresses of their manufacturers. Names of instruments appear in alphabetical order; names of manufacturers of each instrument appear below each instrument entry. The complete name, address, and telephone number of each manufacturer are found in a separate section…

Illustrates ways to recycle plastic milk jugs into useful laboratory equipment. Among the uses described are storage containers, scoops, funnels, and flower pots. (MA)

Provided is a schematic diagram of the projector and a circuit diagram of the optical and electrical components of a simple planetarium that will seat 12 people. There is also a simple map showing major concepts of introductory positional astronomy. (AJ)

Describes four substitutes for asbestos that may be used in science laboratories. (CP)

Reviews techniques for online coupling of high-performance liquid chromatography with mass spectrometry, emphasizing those suitable for application to nonvolatile samples. Also summarizes the present status, strengths, and weaknesses of various techniques and discusses potential applications of recently developed techniques for combined liquid…

Describes the construction of a simple, commercial-type electrode which is compact, not orientation sensitive, and requires the minimum of expensive materials (platinum and mercury). (JN)

Listed are a number of materials including a spectrophotometer, power meter, vacuum pump, fume hood, cart system, and others. The source of the product and a brief description are given for each. (RH)

Microgravity-the absence or reduction of some of the effects of gravity-is an important attribute of free-fall. In microgravity (often incorrectly called zero-g), water no longer flows "downhill" and neither do smoke or steam bubbles rise. This changes a number of chemical and physical activities. Experiments in combustion, fluid behavior,…