Good evening and thank you for joining me for another boring books for bedtime.

I hope tonight's selection provides all the boredom your busy brain needs

to quiet down and let you get some sleep.

So find a comfortable spot.

Adjust your volume.

Take a nice deep breath in.

Let it out slowly.

And off we go.

Tonight, let's continue with a charming look at nature and history, with more from the

story of a boulder, or gleaning from the notebook of a field geologist by Archibald Gecky of the Geological

Survey of Great Britain, illustrated with woodcuts.

First published in 1858 by Thomas Constable and Co.

Printer to Her Majesty, Edinburgh, and Hamilton Adams and Co. London.

Let's pick up right where we left off in the middle of Chapter 2 and our exploration of the glacial age.

Let's begin.

The visible portion of an iceberg is only about one ninth part of the real bulk of the whole mass,

so that if one be seen 100 feet high, its lowest peak may perhaps be away down 800 feet below the waves.

Now it is easy to see that such a moving island will often great across the summit and along the sides of submarine hills.

And when the lower part of the berg is roughened over with earth and stones,

the surface of the rock over which it passes will be torn up and dispersed,

or smoothed and striated, while the boulders embedded in the ice will be striated in turn.

But some icebergs have been seen rising 300 feet over the sea,

...