James Cutbush, an American Chemist, 1788-1823 — A Closer Reading

A Chemist's Own Words: The Newspaper Series

Smith anchors Cutbush's public influence in a series of fifteen articles published in Philadelphia's Aurora newspaper beginning in July 1808, under the heading 'Application of Chemistry to Arts and Manufactures.' Rather than summarizing these articles, Smith lets Cutbush's own definitions stand: chemistry 'has for its object to discover the constituent properties of bodies, the result of the various combinations, and the laws by which those combinations are effected.' The excerpts show Cutbush explaining chemical affinity through experiments—for instance, the union of sulphur and mercury by heat—and distinguishing chemical attraction from cohesion. This direct quotation of Cutbush's instructional voice gives the biography a primary-source texture, allowing readers to assess his clarity and pedagogical approach firsthand.

Apparatus and Experiment: The Textbook Evidence

Smith examines Cutbush's two-volume Philosophy of Experimental Chemistry (1813) not only for its content but for its physical features. The first volume includes a frontispiece depicting a lamp furnace—a brass rod with rings and thumb screws for low-temperature processes like evaporation and distillation. The second volume shows a portable universal furnace made of wrought iron, lined with brick, elliptical in shape, with three sliding doors. Smith notes that both pieces 'represent a marked advancement' and were 'evidently exceedingly useful.' By foregrounding these illustrations, Smith makes a material argument: Cutbush's contribution was not just theoretical but practical, designing tools that enabled reproducible chemical work. The biography thus treats the textbook as both a document and an artifact.

The Potassium Controversy: Woodhouse and Priority

A striking passage in the excerpts concerns the isolation of potassium. Cutbush recounts that James Woodhouse, 'our countryman,' first conjectured that potash had an inflammable base, and that Woodhouse's experiment—mixing pearl ash with soot and heating it—produced a substance that caught fire when water was added. Cutbush reports that Thomas Cooper succeeded in procuring the metal, while he and John Redman Coxe failed; his brother Edward succeeded using a blacksmith's forge. Smith uses this account to suggest that Woodhouse may have isolated potassium 'quite independently from any European chemist,' possibly before Humphry Davy's electrolytic method. The biography does not resolve the priority debate, but it preserves Cutbush's firsthand testimony, showing how early American chemists documented their experimental attempts and failures.

Readers interested in the texture of early American science will find Smith's biography valuable for its reliance on period sources—newspapers, textbooks, and personal accounts—rather than retrospective judgment. The excerpts offer a window into how chemistry was taught, practiced, and communicated in the early republic, with Cutbush serving as a conduit between European knowledge and American application. The book's modest scope, acknowledged by its author, is also its strength: it preserves the voice and context of a working chemist without overreaching.