Make your way out of the room you’re in and head along the corridor you were walking through. As you go, take a peek at the other optic boxes to your right in the huge display case. At the end of the corridor, walk around the corner and you’ll find another corridor (even longer than the previous one). Just like before, there’s a super-long display case running the length of the corridor. The first item on your right is a prototype of “Lanterna Magica” (literally “magic lantern”).