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
Quentin Quire go to a mutant tattooist and have their arms marked with an Omega symbol over an X, then attack U-Men Central. Returning to school, the "Omega Gang" ambushes Professor X with a baseball bat and clamps his head in a thought-proof helmet. The next day, at the school's "Open Day" to parents and the media, Quire publicly proclaims it is "open season on humans" and starts a riot. Some of the students join Quire in protesting Xaviers' policies, but most of the damage is done by the Omegas themselves. They are finally subdued by Beast, Cyclops, Emma Frost and Xorn.