Public domain
Bureau of Standards speeds up photomicrography with new apparatus. Washington, D.C., Aug. 18. By means of this new apparatus just designed by the metallurgical divisions of the National Bureau of Standards, it is now possible to make 700 micrographs per working day of the structural effect of corros
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineBureau of Standards speeds up photomicrography with new apparatus. Washington, D.C., Aug. 18. By means of this new apparatus just designed by the metallurgical divisions of the National Bureau of Stan. 1937-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
