[For contamination] from the following sources of tumah the nazir must shave: for a corpse, or an olive’s bulk of a corpse, or an olive’s bulk of netzel, or a ladle full of decayed corpse, or the spinal column, or the skull, or a limb [severed] from a corpse, or a limb [severed] from a liv- ing body that has on it sufficient flesh, or half a kav of bones, or half a log of blood —- [whether their contamination is transmitted] by contact, carrying, or a roof; and for [tumah from] a bone the size of a barley-grain —- [whether its contamination is transmitted] by contact or by carrying. For these a nazir shaves, sprinkles on the third and seventh day, forfeits the previous days, and does not resume counting until he becomes tahor and brings his sacrifices.