From Chapter 3:
Taking tobacco was clearly an accomplishment to be studied seriously. Shift, a professor of the art in Jonson's play, puts up a bill in St. Paul's—the recognized centre for advertisements and commercial business of every kind—in which he offers to teach any young gentleman newly come into his inheritance, who wishes to be as exactly qualified as the best of the ordinary-hunting gallants are—"to entertain the most gentlemanlike use of tobacco; as first, to give it the most exquisite perfume; then to know all the delicate sweet forms for the assumption of it; as also the rare corollary and practice of the Cuban ebolition, euripus and whiff, which he shall receive, or take in here at London, and evaporate at Uxbridge, or farther, if it please him."

From Chapter 8:
The allusion in these verses to a "satiric wipe" refers to a passage in the poem entitled "Conversation," which Cowper had written in the previous year, 1781. In this passage tobacco is abused in terms which Cowper clearly felt to need modification after his personal intercourse with such a smoker as his friend Bull. In describing, in "Conversation," the manner in which a story is sometimes told, the poet says:

The pipe, with solemn interposing puff,
Makes half a sentence at a time enough;
The dozing sages drop the drowsy strain,
Then pause and puff—and speak, and pause again.
Such often, like the tube they so admire,
Important triflers! have more smoke than fire.