rodasi clearly one syllable is wanted to complete the Pada: possibly we should read therefore sunave rodasyoh (comp. verse 2, Pada 2, aratih rodasyoh, which words form the end of the Pada). Agni, as is well known, is the son of the two worlds, the sunuh rodasyoh. In the beginning of the Pada brihati' must either refer to the two worlds: in this case we have to read brihatyoh (instead of brihati' iva); or brihati' may refer, as this adjective frequently does, to the girah, and we shall possibly have to read brihati'h vah (as to vah, comp. Delbruck, Altindische Syntax, 206). But of course all these are mere guesses. In every case the verb on which the accusative girah depends ('we bring,' or something like that) must be supplied.
Verse 6.
Note [1:59:6:1]1. Or, as the killer of Vritra. See H. O., Religion des Veda, 135, note 2.