Wednesday, June 9, 2021

Naval observatory, [Washington, D.C.]

 


1916-17. All new vintage content. I did a few science or engineering related keyword searches at Library of Congress. I try to have at least one new post every day, and sometimes two. 100 posts will fit in the sidebar each month so two posts a day is only 60.

https://www.loc.gov/item/2016825844/

No comments:

Post a Comment