The Operating and Maintenance Instructions, 503-C, make up the bulk of the volume and are dated May 1958. Beckman Instructions 535-A, 17329 Gas-Liquid Partition Chromatography Column (Di-N-Butyl Maleate), dated June 1958, is included at the end of the volume. Intentionally blank pages have been omitted.
Beckman Instruments entered the gas chromatograph business in 1956 with the acquisition of the successful Watts Manufacturing Company. Later that year, Beckman Instruments produced its first gas chromatograph, the GC-1, which was intended for laboratory use. Shortly after, Beckman Instruments produced a line of gas chromatographs for industrial use, which offered both automation and customization. These instruments were used by the petroleum industry and in the fight against air pollution.