'Pouring out the vials upon the earth, which contained the plagues,' in Revelation 16:1, signifies influx of the reformed into the church, or into people who study and receive the doctrine of justification by faith alone.

(Referencias: Apocalypse Explained 16; Apocalypse Revealed 676)

864. Verse 7 And he sent out a raven, and it went out going back and forth until the waters dried up from over the earth.

'He sent out a raven, and it went out going back and forth' means that falsities were still giving trouble; 'a raven' means falsities, 'going back and forth' means that such was their state. 'Until the waters dried up from over the earth' means the apparent dispersal of falsities.