No More Learning

Slender, at first, the subtle fume appears,
And           round and round its volume rears:
Thick as a mast the vapour swells its size,
A curling whirlwind lifts it to the skies;
The tube now straightens, now in width extends,
And, in a hov'ring cloud, its summit ends:
Still, gulp on gulp in sucks the rising tide,
And now the cloud, with cumbrous weight supplied,
Full-gorg'd, and black'ning, spreads, and moves, more slow,
And waving trembles to the waves below.