Keywords: InstrumentShopsatNBS 002.jpg The glass-blowing shop where all the complicated glass-blowing was completed at NBS The shop contained scientific glass apparatus chemical physical electrical mercurial and volumetric apparatus vacuum tubes quartz and pyrex glass apparatus experimental work and repairing and general glass-blowing equipment National Institute of Standards and Technology National Institute of Standards and Technology PD-USGov-NIST PD-USGov National Bureau of Standards National Institute of Standards and Technology Instruments Workshops Pyrex |