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- A dynamic method for determining the vapor pressure of carbon dioxide at 0 C
- Carbon dioxide; fixed point; hypsometer; pressure standard; purification; vapor pressure
- The vapor pressure of carbon dioxide at 0 C, or at 0.01 C, has been used as a fixed point on the pressure scale. Comparisons between laboratories may be affected equally by pressure measurements, temperature measurements, and the purity (and...
- Journal of Research of NIST and Predecessor Publications
- A fabric tension meter for use on aircraft.
- Journal of Research of NIST and Predecessor Publications
- A Fabry-Perot spectrometer for high-resolution spectroscopy and laser work
- A Fabry-Perot spectrometer with a piezoelectric spacer was constructed to record with a recorder, or display with an oscilloscope, the fine structure of the Haidinger fringes. The spectrometer is of the fixed spacer design, which provides great...
- Journal of Research of NIST and Predecessor Publications
- A far-infrared vacuum grating spectrometer
- far-infrared vacuum grating spectrometer, monochromator, Golay detector, crystals
- A far-infrared vacuum grating spectrometer has been designed, built and tested at the National Bureau of Standards. This instrument has been in operation and under constant improvement for the past two years. Its useful range of operation is from...
- Journal of Research of NIST and Predecessor Publications
- A fast method of transforming relaxation functions into the frequency domain
- cubic spline; error estimate; Laplace transform; numeric integration; numeric transform; relaxation function; time domain
- The limits to the error due to truncation of the numeric integration of the one-sided Laplace transform of a relaxation function in the time domain into its equivalent frequency domain are established. Separate results are given for large and small...
- Journal of Research of NIST and Predecessor Publications
- A fast responding electric hygrometer
- Journal of Research of NIST and Predecessor Publications
- A fast-neutron diagnostic probe
- Accuracy in Trace Analysis
- Journal of Research of NIST and Predecessor Publications
- A few observations of the perturbations in the phase of the low-frequency ground wave
- Journal of Research of NIST and Predecessor Publications
- A fiftyfold momentary beam intensification for a high-voltage cold-cathode oscillograph
- Journal of Research of NIST and Predecessor Publications
- A filter for obtaining light at wave length 560 mu
- Journal of Research of NIST and Predecessor Publications
- A finite element study of the interaction of transient stress waves with planar flaws
- concrete; finite element analysis; flaw; Green's function; impact; impact-echo method; nondestructive testing; wave propagation.
- This paper presents a finite element study of transient wave propagation in plates containing planar flaws. The effects on displacement waveforms caused by waves diffracted from the sharp edges of a flaw are determined. Displacement fields within a...
- Journal of Research of NIST and Predecessor Publications
- A finite element study of transient wave propagation in plates
- finite element analysis; Green's function; impact; impact-echo method; plate response; stress wave propagation.
- Studies of transient wave propagation in plates were carried out to establish a basis for the impact-echo technique as a nondestructive test for flaw detection in concrete. The surface displacements caused by stress waves generated by point impact...
- Journal of Research of NIST and Predecessor Publications
- A five-band recording spectroradiometer
- Journal of Research of NIST and Predecessor Publications
- A flow calorimeter for specific heats of gases
- Journal of Research of NIST and Predecessor Publications
- A flow manostat for various purposes, including the candy test
- Journal of Research of NIST and Predecessor Publications
- A forced-draft oven used for drying leather bends before impregnation and for removing solvent afterwards in the NBS pilot plant
- Shoes; Materials; Testing; Leather; Research; Photographs; History; Metrology; 1930s; Laboratories
- This image is part of the Leather Research collection. The Leather Research collection consists of images of National Bureau of Standards (NBS) employees engaged in leather research during periods ranging from 1919 to the early 1960s. After the...
- Historic Images
- A formal solution for slit corrections in small-angle x-ray scattering
- Distribution of intensity; integral equation; scattering cross section; slit correction; small-angle x-ray scattering
- Slit shaped apertures are usually used in small-angle x-ray scattering measurements in order to obtain easily measured intensities of scattered radiation. As a result, the scattering intensity at a given angle determined by the camera, the center...
- Journal of Research of NIST and Predecessor Publications
- A formula and tables for the pressure of saturated water vapor in the range 0 to 374 C
- Journal of Research of NIST and Predecessor Publications
- $A formula for radio ray refraction in an exponential atmosphere$
- A formula for radio ray refraction in an exponential atmosphere
- Journal of Research of NIST and Predecessor Publications
- $A fractionating column with fritted glass plates$
- A fractionating column with fritted glass plates
- Journal of Research of NIST and Predecessor Publications

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