Holmes describes how the myth of this “Eureka moment,” so central to the Romantic notion of scientific discovery, doesn’t quite match the prolonged discussion concerning the precise nature of the tail-less “comet” that Herschel had discerned. It was Keats, in a famous sonnet, who compared the sudden sense of expanded horizons he felt in reading Chapman’s Elizabethan translation of Homer to Herschel’s presumed elation at the sight of Uranus: “Then felt I like some watcher of the skies / When a new planet swims into his ken.” Holmes notes the “brilliantly evocative” choice of the verb “swims,” as though the planet is “some unknown, luminous creature being born out of a mysterious ocean of stars.” As a medical student conversant with scientific discourse, Keats may also have known that telescopes can give the impression of objects viewed “through a rippling water surface.”

Though Romanticism, as Holmes says, is often presumed to be “hostile to science,” the Romantic poets seem to have been positively giddy — sometimes literally so — with scientific enthusiasm. Coleridge claimed he wasn’t much affected by Herschel’s discoveries, since as a child he had been “habituated to the Vast” by fairy tales. It was the second great Romantic field of science that lighted a fire in Coleridge’s mind. “I shall attack Chemistry, like a Shark,” Coleridge announced, and invited the celebrated scientist Humphry Davy, who also wrote poetry, to set up a laboratory in the Lake District.

Coleridge wrote that he attended Davy’s famous lectures on the mysteries of electricity and other chemical processes “to enlarge my stock of metaphors.” But he was also, predictably, drawn to Davy’s notorious experiments with nitrous oxide, or laughing gas. “The objects around me,” Davy reported after inhaling deeply, “became dazzling, and my hearing more acute.” Coleridge, an opium addict who coined the word “psycho­somatic,” compared the pleasurable effects of inhalation to the sensation of “returning from a walk in the snow into a warm room.” Davy passed out frequently while under the influence, but strangely, as Holmes notes, failed to pursue possible applications in anesthesia.

Image Richard Holmes Credit... Courtesy of Richard Holmes

In assessing the quality of mind that poets and scientists of the Romantic generation had in common, Holmes stresses moral hope for human betterment. Coleridge was convinced that science was imbued with “the passion of Hope,” and was thus “poetical.” Holmes finds in Davy’s rapid and systematic invention of a safety lamp for English miners, one that would not ignite methane, a perfect example of such Romantic hope enacted. Byron celebrated “Davy’s lantern, by which coals / Are safely mined for,” but his Venetian mistress wondered whether Davy, who was visiting, might “give me something to dye my eyebrows black.”