![A circular moveable bookcase, 1810. A cylindrical book tower on casters, with shelves for folio, quarto, octavo books topped with a vase. All shelves on rollers to turn independently. Designed by Benjamin A circular moveable bookcase, 1810. A cylindrical book tower on casters, with shelves for folio, quarto, octavo books topped with a vase. All shelves on rollers to turn independently. Designed by Benjamin](https://c8.alamy.com/zooms/6/42c18a6f0d464d8a9ced7a6a0f4d73de/2cfx30t.jpg)
A circular moveable bookcase, 1810. A cylindrical book tower on casters, with shelves for folio, quarto, octavo books topped with a vase. All shelves on rollers to turn independently. Designed by Benjamin
![claire m. l. bourne on Twitter: "octavo | quarto | folio @psulibs https://t.co/Not8D899JH" / Twitter claire m. l. bourne on Twitter: "octavo | quarto | folio @psulibs https://t.co/Not8D899JH" / Twitter](https://pbs.twimg.com/media/DKA6wLSWAAEd70p.jpg:large)
claire m. l. bourne on Twitter: "octavo | quarto | folio @psulibs https://t.co/Not8D899JH" / Twitter
![THE NEEDHAM CALCULATOR (1.0) and THE FLAVORS OF FIFTEENTH-CENTURY PAPER – The Schoenberg Institute for Manuscript Studies THE NEEDHAM CALCULATOR (1.0) and THE FLAVORS OF FIFTEENTH-CENTURY PAPER – The Schoenberg Institute for Manuscript Studies](https://schoenberginstitute.files.wordpress.com/2017/01/about2.png)
THE NEEDHAM CALCULATOR (1.0) and THE FLAVORS OF FIFTEENTH-CENTURY PAPER – The Schoenberg Institute for Manuscript Studies
![The book, its history and development. cut to anysize, and the terms folio, quarto,octavo, and duodecimo do notindicate any actual size exceptin bookbinders specifications.The terms only indicate thenumber of times the The book, its history and development. cut to anysize, and the terms folio, quarto,octavo, and duodecimo do notindicate any actual size exceptin bookbinders specifications.The terms only indicate thenumber of times the](https://c8.alamy.com/comp/2CEK1C0/the-book-its-history-and-development-cut-to-anysize-and-the-terms-folio-quartooctavo-and-duodecimo-do-notindicate-any-actual-size-exceptin-bookbinders-specificationsthe-terms-only-indicate-thenumber-of-times-the-originalsheet-has-been-folded-and-this-obviously-is-a-matter-which-is-subject-to-as-much-variationas-the-printers-choose-but-fortunately-such-foldingsdo-not-vary-much-and-so-we-may-safely-mention-thosethat-are-most-commonly-used-there-are-several-waysof-finding-this-out-the-most-obvious-being-to-count-theleaves-which-follow-any-one-letter-in-the-white-line-at-tljebottom-o-2CEK1C0.jpg)