From Chapter 1:
So far Hariot's "Report" regarded tobacco from the medicinal point of view only; but it is important to note that he goes on to describe his personal experience of the practice of smoking in words that suggest the pleasurable nature of the experience. He says: "We ourselves during the time we were there used to suck it after their maner, as also since our returne, and have found maine [? manie] rare and wonderful experiments of the vertues thereof: of which the relation woulde require a volume by itselfe: the use of it by so manie of late, men and women of great calling as else, and some learned Physitians also, is sufficient witness."

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.