Summary edit

DescriptionAluminumFromClay 001.jpg	The final step in the production of alumina from clay in the pilot plant at the National Bureau of Standards is the conversion of hydrated aluminum chloride to alumina by calcination. The aluminum chloride crystals are fed into the hopper at the top of the 20-foot Herreshoff furnace and are stirred constantly by rabble arms as they pass downward over the heated hearths.
Date	5/1/1947
Source	National Institute of Standards and Technology
Author	National Institute of Standards and Technology
Permission (Reusing this file)	Public domainPublic domainfalsefalse This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code. English ∙ 日本語 ∙ македонски ∙ Nederlands ∙ +/−

The images in the Aluminum from Clay Photographic Collection are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder. Use of the images from NIST Digital Collections is not restricted, but a statement of attribution is required. Please use the following attribution statement: ""National Institute of Standards and Technology Digital Collections, Gaithersburg, MD 20899.""

Licensing edit

This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code. English ∙ 日本語 ∙ македонски ∙ Nederlands ∙ +/−