It’s one of the lessons that any driving instructor worth their salt will tell you early on – be mindful of the fact that ...

Mostly used to help older people read, these lenses focused on objects between ... That secondary mirror, in turn, bounced the light (and thus the image seen) into a convex eyepiece lens built ...

A slave would have held the mirror by the ornate handles so that the lady could view her face in the polished convex side of the mirror. The mirror is only one of numerous important items found ...