Note 3084 — THE CURE OF MELANCHOLY. (continued 2)
Reading edition
Epist. lib. 1 p. 83. Ex quibus constat nec diversa aeris et aetheris diaphana esse, nec refractiones aliunde quam a crasso aere causari—Non dura aut impervia, sed liquida, subtilis, motuique Planetarium facile cedens.