Museum of Glass
In this long shot, you can see the three main phases of the pour.
In the background, you can see the shiny surface of the initial pour.
In the middle left, a shadow of a man is using a power trowel to further smooth
the surface of the concrete, a process which requires allowing the concrete to cure about 2 hours.
When he is finished with this, he will use a long handled broom to give it the uniform texture you see in the foreground.
Photograph by K. L. Slusher