Decades: 1200s 1210s 1220s 1230s 1240s - 1250s - 1260s 1270s 1280s 1290s 1300s
Years: 1246 1247 1248 1249 1250 - 1251 - 1252 1253 1254 1255 1256
Births
Deaths
... amplified by wrist motion. It takes a while until one finds the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping ...