Hoc etiam pacto volucri loca lumine tingunt nubes et tremulo tempestas impete fulgit: ventus ubi invasit nubem et versatus ibidem fecit ut ante cavam docui spissescere nubem, mobilitate sua fervescit; ut omnia motu percalefacta vides ardescere, plumbea vero glans etiam longo cursu volvenda liquescit.
In this way also the clouds tinge places with swift light, and the storm flashes with a quivering rush. When wind has entered a cloud, and moving about within the same has made the cloud grow grows hot thick round the hollow, as I explained before, it becomes hot by its own quick movement; just as you see everything become very hot and catch fire by movement, and indeed a leaden bullet even melts when it is whirled a long distance.
final_alignments\Lucretius_De_Rerum_Natura_Book6.json