Units of paper quantity size and type of paper being sold. Reams of 500 sheets (20 quires of 25 sheets) were known in England in c1594; in 1706 a ream was defined as 20 quires, either 24 or 25 sheets to the quire. In 18th- and 19th-century Europe, the size of the ream varied widely. In Lombardy a ream of music paper was 450 or 480 sheets; in Britain, Holland and Germany a ream of 480 sheets was common; in the Veneto it was more frequently 500. Some paper manufacturers counted 546 sheets (21 quires of 26 sheets). J.S. Bach's manuscript paper at Weimar
Codex where the membrane was folded so that it turned out an eight-leaf quire, with single leaves in the third and sixth positions. The next stage was tacking the quire. Tacking is when the scribe would hold together the leaves in quire with thread. Once threaded together, the scribe would then sew a line of parchment up the "spine" of the manuscript, as to protect the tacking. Codex A codex () (from the Latin "caudex" for "trunk of a tree" or "block of wood", "book"), plural "codices" (), is a book constructed of a number of sheets of paper, vellum, papyrus,