Browsing items in: All Collections

(13572 results)

Sort by: Subject

Title

Description

Subject

Display Options

Display: 20

100

200

- Thumbnail
- Title
- Subject
- Description
- Collection
- Wheatstone Bridge
- This Anthony form of Wheatstone Bridge with plug connections and the possibility of interchanging ratio coils was the "last word" in precision when it was purchased by the National Bureau of Standards in 1902. The coils are of the conventional...
- NIST Museum Artifacts
- Stability of residual thiosulfate in processed microfilm.
- residual thiosulfate, processed microfilm, sodium dichromate, barium chloride, lithium chloride, humidity
- The concn. of residual thiosulfate (I) and its variation with storage humidity were measured in processed microfilm. The I in the clear, Ag-free area of the processed film was stable for at least 9 months at 14% relative humidity (room temp.), but...
- Journal of Research of NIST and Predecessor Publications
- Determination of residual thiosulfate in processed film
- residual thiosulfate, processed film, Crabtree-Ross test, turbidity, gelatin
- The Crabtree-Ross procedure, employing the reaction of thiosulfate with mercuric chloride to form a turbid solution is the usual test for residual thiosulfate in processed film. Qualitative tests showed that in this procedure part of the...
- Journal of Research of NIST and Predecessor Publications
- Treasure of the Past VIII: Molecular basis of flame inhibition
- Reprint; fire retardants flame inhibition; flames
- The role played by inorganic chemical additives in fire retardancy and flame inhibition is considered. Particular attention is given to the molecular level aspects of commercially important systems containing compounds of antimony, halogens, and...
- Journal of Research of NIST and Predecessor Publications
- Treasure of the Past V: Experimental manufacture of paper for war maps
- Reprint
- Early in world War II, a new map paper was developed that greatly improved the quality and performance of war maps. The National Bureau of Standards cooperated in the development and, subsequently, determined by experimental manufacture how to make...
- Journal of Research of NIST and Predecessor Publications
- Treasure of the Past: I. Recomparison of the United States Prototype Meter.
- Reprint
- Journal of Research of NIST and Predecessor Publications
- Treasure of the Past: IV. The standard-cell comparator. A specialized potentiometer
- Reprint
- The standard cell plays a very important role in the maintenance of the electrical units and in correlating the units of the various national laboratories. Modern standard cells have obtained such a high degree of reproducibility and permanence as...
- Journal of Research of NIST and Predecessor Publications
- $Treasure of the Past VII: Measurement of the thickness and refractive index of very thin...$
- Treasure of the Past VII: Measurement of the thickness and refractive index of very thin films and the optical properties of surfaces by ellipsometry
- Reprint
- The use of the ellipsometer for the measurement of the thickness and refractive index of very thin films is reviewed. The Poincare sphere representation of the state of polarization of light is developed and used to describe the reflection process....
- Journal of Research of NIST and Predecessor Publications
- Treasure of the past: II - The atomic weight of bromine (Reprinted from Bulletin of the Bureau of Standards, vol 9, pg 131-150, 1913)
- Reprint
- Journal of Research of NIST and Predecessor Publications
- Treasure of the Past VI: Standard potential of the silver-silver-chloride electrode from 0 degrees to 95 degrees C and the thermodynamic properties of dilute hydrochloric acid solutions
- Reprint
- Journal of Research of NIST and Predecessor Publications
- Treasure of the past III: Gravitational Anisotropy in Crystals
- Reprint
- Einstein's theory of gravitation is based upon a fundamental postulate which asserts that gravitation and inertia are identical in nature and hence indistinguishable. This if true, is of the greatest theoretical importance, for gravitation has...
- Journal of Research of NIST and Predecessor Publications
- Generalization of Rennie's inequality
- Rennie's inequality; Kantorovich inequality
- A generalization is given of Rennie's recent extension of the Kantorovich inequality. The result is used in an alternate proof of the sharp upper bounds for ratios of weighted means obtained by Cargo and Shisha.
- Journal of Research of NIST and Predecessor Publications
- An Improvement in the reliability of standard cell enclosures
- reliable temperature controller; standard cell enclosure; temperature protection circuit; temperature-regulated oven
- We describe the design of a new temperature-regulation circuit, which is used as an outer oven controller for new standard cell enclosures, with the emphasis on improving the reliability of the temperature control. A redundant protection circuit is...
- Journal of Research of NIST and Predecessor Publications
- Response of microchemical balances to changes in relative humidity.
- relative humidity, absorption, hygroscopic materials, moisture, microchemical balances
- The effects of relative humidity were Investigated on four microchemical balances (two equal-arm two-pan and two one-pan direct reading). Tests were begun by reading the balance indications at low relative humidities; humidified air was then...
- Journal of Research of NIST and Predecessor Publications
- Oral history interview of Curt Reimann , April 9, 2007 / with David Lide, Harry Hertz, and Hans Oser
- Reimann, Curt
- Curt Reimann recalls his career at NBS/NIST from October 1, 1962 until his retirement in 1995. The Malcolm Baldrige Award was initiated under the Directorship of Ernest Ambler, National Bureau of Standards Director, through the efforts of Curt...
- NBS-NIST Oral Histories
- Study at 1046 megacycles per second of the reflection coefficient of irregular terrain at grazing angles
- reflection coefficient, irregular terrain, grazing angle, Rayleigh, Pikes Peak, Cheyenne Mountain, Fort Carson, reflecting region, conventional method, random method
- An experimental determination of the reflection coefficient over rough terrain is reported. The reflected signal received over rough terrain is considered to be made up of two components, one that is a specular component and the other a...
- Journal of Research of NIST and Predecessor Publications
- Electrodynamometer
- This Reflecting Dynamometer, Serial No. 12895, was manufactured by H. Tinsley & Co. London, and purchased through Biddle about 1916. It has a scale of 500 divisions on the circumference of the upper wooden suspension mount, and a tangent screw to...
- NIST Museum Artifacts
- The apparent thermal radiation properties of an isothermal V-groove with specularly reflecting walls
- Reflectance; specular walls; thermal radiation; V-grooves
- The reflection of a parallel beam of light incident in a V-groove is treated for the case when the walls are specularly reflecting. Methods of calculating apparent reflectances and absorptances are given. Experiments have been performed to test the...
- Journal of Research of NIST and Predecessor Publications
- A refined X-band microwave microcalorimeter
- refined x-band microwave microcalorimeter, microcalorimeter, bolometric, thermopile, temperature, Macpherson and Kerns, microwave power, bolometer
- The microcalorimetric method for evaluation of the efficiency and substitution error of a bolometer mount proposed by Macpherson and Kerns has been the object of further study and refinement at the Boulder Laboratories of the National Bureau of...
- Journal of Research of NIST and Predecessor Publications
- Oral history interview of Richard Reed, May 14, 1987 / by Karma Beal
- Reed, Richard
- Richard Reed remembers his metallurgy work at the Boulder Labs in Colorado. He recalls his work in the Properties of Solids at Cryogenic Temperatures group, their work in phase transformations, fracture and deformation research, the failure...
- NBS-NIST Oral Histories

Add or remove other collections to your search:

Narrow your search by:

Creator

Date

Format

Subject

Browsing items in: All Collections

QuickView

Layout options:

		Thumbnail with title
		Grid with smaller thumbnails and more detail