ObjectsViewing Record 32 of 537
Previous Record Next Record
Switch Views: Lightbox | Image List | List
Welcome to the archived version of the MIT Museum's online collections portal! This site was used to test features and content for the newly redesigned MIT Museum Collections site, which has now launched with over 106,000 objects. Please use the new MIT Museum Collections site for further research and discovery. Webmuseum.mit.edu remains online during the transition period but will not receive new updates or content.
High Voltage Lab film density rule
Object type: slide rule
Maker: Place made: United States, Massachusetts, Cambridge, MIT, High Voltage Lab
Date made: 1943-10-20
Measurements: 1/2 in x 10 1/4 in x 1 1/4 in
Nomenclature: data processing tools and equipment - slide rules
Classification: tools and equipment
Wooden slide rule, painted white, marked with scales: Exposure time in seconds for a density of 1.0 above fog density on e.k. type A X-ray film [Steel thickness-inches, Relative speed, Type A Film total density, Target-film distance in inches, material] tube current in microamperes, equivalent steel thickness-inches. Labelled on front "2.0 Million Volts D. C. // High Voltage LAb, Bldg. 46 // Mass. Institute of Technology." On reverse: Instructions for use, development time/temperature chart for Kodak film. In black cardboard box.
Gift of Mrs. William W. Buechner