TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable TI - Beckman R-120 Voltmeter ID - mk61rh127 AV - Beckman Historical Collection, Box 81 VL - Beckman Historical Collection, Box 81 AN - Beckman Historical Collection, Box 81 UR - https://digital.sciencehistory.org/works/mk61rh127 KW - Electric currents KW - Scientific apparatus and instruments KW - Voltmeters KW - Beckman Instruments, Inc. LA - ER -