TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: Public Domain Mark 1.0 TI - Instruction Manual, Beckman Models DU and B Flame Spectrophotometers ID - 9w0323862 AU - Beckman Instruments, Inc. DA - 1963/09// YR - 1963 AV - Beckman Historical Collection, Box 104, Folder 215 VL - Beckman Historical Collection, Box 104, Folder 215 AN - Beckman Historical Collection, Box 104, Folder 215 UR - https://digital.sciencehistory.org/works/9w0323862 AB - The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company was still called National Technical Laboratories. Spurred by employee Howard Cary (who had previously been involved in pH meter development), NTL produced its first DU Spectrophotometer prototype in 1940. This first Model A contained a glass prism, while subsequent models used quartz crystal. The DU was initially developed under a U.S. government contract, but was ultimately used in many important scientific discoveries and developments of the 20th century, including penicillin and synthetic rubber research, petroleum refining, and the creation of explosives. KW - Ultraviolet spectroscopy KW - Flame spectroscopy KW - Spectrophotometer KW - Beckman Instruments, Inc. KW - Scientific apparatus and instruments LA - English ER -