Description: When curators at the Smithsonian National Museum of American History looked at seven radiometers in storage, they learned the instruments had been at the Smithsonian for nearly one hundred fifty years.
Description: Despite another year of telework and limited physical access to our collections, the Smithsonian Institution Archives has continued to serve our researchers and share more of our collections with the public.
Showing results 4657 - 4668 of 5086 for Assistant Secretary in Charge of the United States National Museum