Decades: 1180s 1190s 1200s 1210s 1220s - 1230s - 1240s 1250s 1260s 1270s 1280s
Years: 1234 1235 1236 1237 1238 - 1239 - 1240 1241 1242 1243 1244
Births
Deaths
... around. (The precessing motion is perpendicular to the torque trying to make the gyro fall over.) The axis of the gyroscope in the Dynabee is fixed to the ...