Search Results
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3 itemsFormula for silvering film
- 1931-Aug-25
The handwritten document was created in connection with Arnold O. Beckman's consulting work for Lee de Forest.
- Creator Of Work Beckman, Arnold O.
- Subject Silver films (Metal coating), Silvering, Celluloid
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Calibration of a McLeod Gauge
- 1930s
The McLeod Gauge measures very low pressures of gasses. Its presence in this collection indicates that it was used during the production of Beckman Instruments' early pH meters. These calibrations may have been written…