Decades: 1160s 1170s 1180s 1190s 1200s - 1210s - 1220s 1230s 1240s 1250s 1260s
Years: 1213 1214 1215 1216 1217 - 1218 - 1219 1220 1221 1222 1223
Births
Deaths
... pushes against the lower rim of the groove. While the axis is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brake ...