APPROACH TO THE TABERNACLE (XII)

Ten curtains formed of byssus twined, and blue,

Purple, and scarlet, clasped as one with gold

- God's tabernacle - met the approacher's view.

Thus those who see the house of God behold

That it has moral features of the Lord,

The fulness of whose worth cannot be told,

So that the house knows nothing untoward

Since it is merged in heavenly accord.

They're trying to educate me about weather.  My tutor explains:

Cumulus humilis radiatus to be exact! (Translation from Latin: cumulus = small heaped clouds; humilis = longer than taller; radiatus = arranged in parallel lines).  They are forming preferentially over the mountains (due to air temperature at mountain height being greater than in free atmosphere over the nearby lowlands, thus creating gentle anabatic winds which blow upslope and generate the clouds. In contrast, the air above the cool water of the Firth is cloud free.

The view is the Ochil Hill from Bo'ness, with the Forth between.