Included is a list of laboratory instruments and equipment and the names and addresses of their manufacturers. Names of instruments appear in alphabetical order in heavy black type and the names of manufacturers of each instrument appear below each instrument entry in ordinary type. Each instrument is identified by a "category number." Unnumbered cross references are provided for instruments that can be listed in more than one place in the alphabet. Each manufacturer has also been assigned a "manufacturer's number." Complete names, addresses, and telephone numbers of all manufacturers are given in a separate section. Manufacturers are listed in alphabetical and numerical order. (Editor/PS)