διὰ λαμπροτάτου βαίνοντες ἁβρῶς αἰθέρος → passing lightly through clear-shining air (Euripides, Medea 829)
P. and V. βίβλος, ἡ; see book.
bulk: P. and V. ὄγκος, ὁ.
volumes of smoke: use P. and V. πολὺς καπνός, ὁ.