Smithsonian Libraries' locations remain temporarily closed. To view the status of the Smithsonian’s other museums,
research centers, and Zoo, visit si.edu/museums.
Smithsonian Libraries' locations remain temporarily closed. To view the status of the Smithsonian’s other museums,
research centers, and Zoo, visit si.edu/museums.
![Cover of Su[m]ma de arithmetica geometria proportioni [et] proportionalita](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/summadearithmeti00paci_cover.jpg?itok=4VowIpxD "Cover of Su[m]ma de arithmetica geometria proportioni [et] proportionalita")