ponderosity

What does the lightest of substances do in this ponderosity?

It seems strange to see an Englishman with so little physical ponderosity and obtuseness of nerve.

Yet did he also bow low under the weight of his own ponderosity, as the author of such a vast load of literature.

"Oh, everything comes here," said Beaton, impatient of the elder's ponderosity.

Suddenly the door of the ducal cavern closed in all its metallic ponderosity.