All Smithsonian museums and Smithsonian Libraries locations continue to be closed to support the effort to contain the spread of COVID-19. We are not announcing a re-opening date at this time and will provide updates on a regular and as-needed basis.
![Cover of [Measuring the earth]](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/measuringearth00willcover.jpg?itok=K17n1awj "Cover of [Measuring the earth]")
![Cover of Trattato dell'arithmetica superiore ; [Trattato della trigonometria] ; [Trattato della meccanica]](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/trattatodellari00burncover.jpg?itok=vPZMOMDP "Cover of Trattato dell'arithmetica superiore ; [Trattato della trigonometria] ; [Trattato della meccanica]")
![Cover of Memorandum of Agreement [specifications for a locomotive steam engine]](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/memorandumagree00jack_cover.jpg?itok=HwbxcCwu "Cover of Memorandum of Agreement [specifications for a locomotive steam engine]")
![Cover of [Applicazione della fotografia alla microscopia]](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/applicazionedel00tedecover.jpg?itok=iV_piuwF "Cover of [Applicazione della fotografia alla microscopia]")
