"Essence is that imponderable part of being which includes the soul, the mind, the intelligence, in fact the entire mentality.
"Common Sense Subtitle: How To Exercise It"
Yoritomo-Tashi
In some way an imponderable amount of oil or dissolved wax is extruded and mixed with the drop, an invisible shellac which toughens the bubble and gives it an astounding glutinous endurance.
"Edge of the Jungle"
William Beebe
Comets seem to be almost imponderable when estimated by such robust masses as those of the earth, or any of the other great planets.
"The Story of the Heavens"
Robert Stawell Ball