This is the third in the fourth series of general bibliographies developed to disseminate information on documents analyzed at the ERIC Information Analysis Center for Science and Mathematics Education. Reported are 355 citations of selected documents related to instructional equipment and materials for science and/or mathematics education. The…

Reported is a survey of astronomy programs in the educational and research institutions in New York State. This report shows that astronomy in New York State is highly diversified; both public and private supported institutions have strong, excellent programs. Many institutions with strong physics departments see the value of growing interaction…

The entire issue is given over to the listing of laboratory instruments and equipment and the names and addresses of their manufacturers. Names of the instruments appear in alphabetical order in the guide. In a separate section, following the guide, the complete name and telephone number of each manufacturer may be found, also listed in…

Presents brief descriptions and sources of new apparatus and equipment related to chemistry. (RH)

Includes descriptions and sources for many types of apparatus and equipment for use in chemistry. (RH)

Described are a number of publications and items for use in chemistry. Included are brief descriptions of actuators, thermometer strips, current balances, and a variety of catalogues and other publications. (RH)

Inexpensive, low-density polyethylene tubing has physical characteristics about midway between glass and rubber. For many laboratory uses it may be superior to both. (BB)

An easily constructed apparatus that models the effect of penicillin on the structure of bacterial cells is described. Background information and procedures for using the apparatus during a classroom demonstration are included. (JN)

A relatively simple opto-electronic setup is described that utilizes a cadmium sulphide (CdS) photoconductive cell to detect resonance of a stretched vibrating string or wire. The display may be either an oscilloscope or a frequency counter. Also describes an inexpensive socket for flanged-base light bulbs. (JN)

A high-impedance comparator suitable for monitoring the resistivity of a deionized or distilled water line supplying water in the 50 Kohm/cm-2 Mohm/cm range is described. Includes information on required circuits (with diagrams), sensor probe assembly, and calibration techniques. (JN)