Ua haku ʻia ka mea ʻoki e Cyrus McCormick. ʻOhi He mīkini hoʻohui no ka ʻohi ʻana i nā mea kanu. E hoʻopau i ka ʻohi a me ka ʻohi ʻana i ka manawa hoʻokahi, a e hōʻiliʻili i ka palaoa i loko o ka pahu mālama, a laila e hoʻoili i ka palaoa i ke kaʻa lawe ma o ke kāʻei conveyor. Hiki ke ʻohi ʻia me ka lima, a hohola ʻia ka mauʻu raiki, ka palaoa a me nā mea kanu ʻē aʻe ma ke kula, a laila ʻohi ʻia ka mea ʻohi palaoa a ʻohi. ʻO nā mīkini ʻohi huaʻai no ka ʻohi ʻana i ka palaoa a me ka mauʻu o ka raiki, ka palaoa a me nā mea kanu cereal ʻē aʻe. Me ka mea hōʻiliʻili, winder, bale, grain combine harvester a me grain thresher. Hoʻokumu ʻia nā mea ʻohi palaoa ma ke kumu o nā mea ʻohi like ʻole a me ka ʻohi ʻana.