Book IV of Lucretius’s On the Nature of Things, in Leonard’s verse translation, treats sight and the other senses according to the physics of Epicurus. The poet speaks of “effigies of things” and “tenuous shapes” sent from the surfaces of bodies, and compares them to “films” or a “rind”. The passage stands under “Key terms” for the account of how things are seen.
Read in contextAnd thus I say that effigies of things,
And tenuous shapes from off the things are sent,
From off the utmost outside of the things,
Which are like films or may be named a rind,
Because the image bears like look and form
With whatso body has shed it fluttering forth—
A fact thou mayst, however dull thy wits,
Well learn from this: mainly, because we see
Even ‘mongst visible objects many be
That send forth bodies, loosely some diffused—
Like smoke from oaken logs and heat from fires—
And some more interwoven and condensed—
As when the locusts in the summertime
Put off their glossy tunics, or when calves
At birth drop membranes from their body’s surface,
Or when, again, the slippery serpent doffs
Its vestments ‘mongst the thorns—for oft we see
The breres augmented with their flying spoils:
Since such takes place, ’tis likewise certain too
That tenuous images from things are sent,
From off the utmost outside of the things.
