The map is spread across the wooden floor and laminated with a glass slab.

What about that glass slab with the dark windows?

He was ten floors up in a glass slab, looking down at me.

He ran the inked roller over the glass slab, and going to Bliss, asked him to hold out his hands.

It was a translucent gray cylinder suspended between two black glass slabs.

Then he took out a little wire stand on which the glass slab fitted comfortably.

The train was slowing and the world of the past had shrunk itself into the glass slab once more.

But, when light passes through a glass slab, its speed decreases.

Which force caused light to increase its speed again after passing through the glass slab?

The glass slab had missed her, but she'd hit real hard when the cube rolled.