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Early modern European paper is made with a mould, at a vat. So a hand-made paper sheet depends on the size of the mould. #paperhistory

And here it gets tricky. Moulds varied, and the size of the manufactured sheet may also change due to subsequent trimming and binding etc.

As a beginner's guide to early modern paper sizes used in Europe (the rest of the paper world used other sizes!), I recommend the "Needham Calculator", honoring paper expert Paul Needham: needhamcalculator.net

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The inscription of the stone goes like this:

These are the moulds of the city of Bologna, which say what the sizes of the sheets of cotton paper must be, which are made in Bologna and the surrounding area, as is set out here below. #PaperHistory

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Meet the "Bologna stone" of 1389, #paperhistory and #bookhistory folks. The stone appears today in the Museo Civico Medievale, Bologna, Italy, and carries the oldest known European paper sizes:

»Imperialle« (500 x 740 Millimeter),
»Realle« (445 x 615 Millimeter),
»Meçane« (345 x 515 Millimeter) and
»Reçute« (315 x 450 Millimeter).

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Frederik Muller (2018) Was Lorenz Fries’s 1525 Strasbourg Ptolemy Atlas Complete? Or Were Two Maps Omitted?, Imago Mundi, 70:1, 1-26, doi.org/10.1080/03085694.2018.

23 Nov 1616: d. Richard Hakluyt, Church of #England priest, promoter of #English colonies in #America, compiler of travel accounts

Replace these “wireless telegraphs” with smartphones, update the dress a little, and this vision of "isolating technology" from a 1906 issue of Punch magazine could easily be from today: publicdomainreview.org/collect #history #technology #illustration #histodon

Hello new followers! Here is why medieval books are so cool and modern: their makers already included selfies, this one is 700-years old and by "Rufillus".

Cologny, Bodmer, 127, 12th century). Full page zoomable: e-codices.unifr.ch/en/fmb/cb-0.

More in this blog post: medievalbooks.nl/2018/09/20/me.

#medieval #bookhistory #history #selfies #CharmingOldBooks

Well, finally after all these years, someone's got an intuitive explanation of the moves required for Rubik's cube!

RT @jagarikin@twitter.com

あの伝説のルービックキューブをさらにわかりやすくしました

🐦🔗: twitter.com/jagarikin/status/1

Cohen, H. F. (2010). How Modern Science Came into the World: Four Civilizations, One 17th-Century Breakthrough. Amsterdam University Press. doi.org/10.2307/j.ctt45kddd

#introduction We are The Conversation UK. You may have seen our US, Australian and Spanish news outlets come to #mastodon:

@TheConversationUS @theconversationes
@theconversationau

We believe in news by experts. Free to read. No paywalls: theconversation.com/uk

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