For the canals cf. c. 184 n. The canal here is the ‘royal canal’ restored by Nebuchadnezzar, which ran south-east from above Babylon to the Tigris, near the later Seleucia. πρὸς ἥλιον τὸν χειμερινόν. The ancients divided the sky into
ἀνατολή and δυσμὴ ἰσημερινή = E. and W. |
ἀνατολή and δυσμὴ θερινή = NE. and NW. |
ἀνατολή and δυσμὴ χειμερινή = SE. and SW. |