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- NIST researchers Edwin Heilweil (right) and Michael Casassa adjust the fast-pulsed laser used to study instantaneous chemical reactions
- Photographs; History; Metrology; Research institutes; Laboratories
- Ths image is part of the Special Publication 783, Research Report
- Historic Images
- NIST researchers use this prober for deep-level transient spectroscopic studies of defects in electronic thin films
- Photographs; History; Metrology; Research institutes; Instruments
- Ths image is part of the Special Publication 783, Research Report
- Historic Images
- Towards near perfect crystals with only well-characterized imperfections
- ARPA; crystallography; dislocations; free-radicals; melt growth; point defects; purification; solution growth; symmetry of crystals; twinning; vacancies; vapor growth
- Throughout the past century NBS/NIST supported a great variety of research studies in crystallography where the aim was the highest attainable accuracy in measurements. While avoiding overlap with other papers in this volume, this article...
- Journal of Research of NIST and Predecessor Publications
- Borosilicate Master Plate
- Three transparent rings.
- NIST Museum Artifacts
- Coatings formed on steel by cathodic protection and their evaluation by polarization measurements.
- steel, corrosion, cathodic protection, polarization, measurement
- Three steel specimens were continuously exposed in the laboratory for almost 5 years in city water to which was added 3 percent by weight of sodium chloride. Two of these specimens were under continuous cathodic protection, one by current from a...
- Journal of Research of NIST and Predecessor Publications
- Pyrex, Quartz, and Metal Rods.
- Three rods. One made of Pyrex, one of Quartz, and one Metal (engraved 463 mm). Made by Brown and Sharp Manufacturing, Providence, RI.
- NIST Museum Artifacts
- Note on the solution of riccatis differential equation
- Formulas; Riccati's equation; SEAC
- Three recurrence formulas are developed, giving the solution of a particular case of Riccati's equation in power series valid in the neighborhoods of 0, 8 , and an arbitrary point, respectively. The first two were programed for computation on the...
- Journal of Research of NIST and Predecessor Publications
- Project Tinkertoy soldering operation
- Photographs; History; Metrology; Electronic apparatus and appliances; Unit construction
- Three pairs of wires are guided into three notches on opposite sides of the stacked wafers. Soldering irons, shaped to engage only the wafer notches, automatically bond the riser wires to the module. This image is from the Project Tinkertoy...
- Historic Images
- Tetragermanates of strontium, lead, and barium of formula type AB4O9
- Barium; formula; lead; strontium; tetragermanates
- Three new tetragermanates, SrGe4O9, PbGe4O9, and BaGe4O9, of formula type AB4O9 were found. BaTiGe3O9, the germanium analog of the mineral silicate benitoite (BaTiSi3O9) was prepared for study and comparison. Indexed X-ray powder dif-fraction...
- Journal of Research of NIST and Predecessor Publications
- Methods of predicting the atmospheric bending of radio rays
- Three methods for predicting the bending of radio rays when the refractive index profile above the surface layer is unknown have been developed recently by the authors. These methods are: a statistical technique for refraction at high initial...
- Journal of Research of NIST and Predecessor Publications
- Elementary considerations of the effects of multipath propagation in meteorburst communication
- Three mechanisms likely to regularly produce multipath propagation are examined. These are: (1) The simultaneous existence of two meteor trails; (2) the existence of a Rayleigh-fading background continuum; and (3) the existence of two first-Fresnel...
- Journal of Research of NIST and Predecessor Publications
- Gas proportional counters
- radiation physics; National Bureau of Standards (U.S.)
- Three ion chambers used for internal gas proportional counting
- NBS-NIST Divisions, Offices, and Programs
- A method for determining the elastic constants of a cubic crystal from velocity measurements in a single arbitrary direction; application to SrTiO3
- Three independent velocities of sound can be measured along any direction of propagation in a cubic crystal except the [100] and [111] directions. These three velocities suffice to determine the three elastic constants and for the [110] direction,...
- Journal of Research of NIST and Predecessor Publications
- Three improvements in reduction and computation of elliptic integrals
- computational algorithm; elementary symmetric function; elliptic integral; hyperelliptic integral; hypergeometric R-function; recurrence relations; series expansion
- Three improvements in reduction and computation of elliptic integrals are made. 1. Reduction formulas, used to express many elliptic integrals in terms of a few standard integrals, are simplified by modifying the definition of intermediate "basic...
- Journal of Research of NIST and Predecessor Publications
- Fluorine Combustion Bomb
- Three fluorine combustion bombs.
- NIST Museum Artifacts
- Brass 25 Kilogram Mass Weights
- Three 25 kg mass weights in a wood box.
- NIST Museum Artifacts
- Portrait of Thomas J. Murphy
- Photographs; History; Metrology
- Thomas J. Murphy was inducted into the NIST Gallery of Distinguished Scientists, Engineers, and Administrators in 2003 “For many publications concerned with atomic weights of the elements, high accuracy analysis, and trace element analysis for such...
- NBS-NIST Employees - Historic
- New strength test for leather being evaluated by NBS staff member Thomas J. Carter of the Institute of Material Research
- Shoes; Materials; Testing; Leather; Research; Photographs; History; Metrology; 1960s; Laboratories
- Thomas J. Carter of the NBS Institute for Materials Research adjusts a leather sample in preparation for a slit-tear test of the strength of the leather. This test was compared with three other leather strength test already described in Federal...
- Historic Images
- OMH-Hungary Tribute to NIST
- This yellow cut glass prism was given to the National Institute of Standards and Technology (NIST) by the Hungarian National Office of Measures (OMH) in honor of NIST�s centennial in 2001. The Hungarian seal is etched in the bottom. It is housed in...
- NIST Museum Artifacts
- Test Equipment for WWII Radar Counter-Measures (CXFD)
- This World War II era test equipment was for use with radar counter-measures (CXFD) and designed to substitute for a radar system for testing CXFD equipment (see artifact 1998.0138.001A-B), radar jammers, beacon systems, and similar devices, and...
- NIST Museum Artifacts

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