From Chapter 3:
"A Tobacco-Seller," says Earle, "is the onely man that findes good in it which others brag of, but do not; for it is meate, drinke, and clothes to him. No man opens his ware with greater seriousnesse, or challenges your judgement more in the approbation. His shop is the Randevous of spitting, where men dialogue with their noses, and their communication is smoake. It is the place onely where Spaine is commended, and prefer'd before England itselfe. He should be well experienc'd in the world: for he ha's daily tryall of mens nostrils, and none is better acquainted with humors. Hee is the piecing commonly of some other trade which is bawde to his Tobacco, and that to his wife, which is the flame that follows this smoke."

From Chapter 8:
More than one writer of recent days has absurdly misrepresented Johnson as a smoker. The author of a book on tobacco published a few years ago wrote—"Dr. Johnson smoked like a furnace"—a grotesquely untrue statement—and "all his friends, Goldsmith, Reynolds, Garrick, were his companions in tobacco-worship." Reynolds, we know—

When they talk'd of their Raphaels, Corregios, and stuff,
He shifted his trumpet, and only took snuff.

Johnson and all his company took snuff, as every one in the fashionable world, and a great many others outside that charmed circle, did; but Johnson did not smoke, and I doubt whether any of the others did.