Treatment of Gold Quartz in California. Reprinted from "Engineering".
London: Offices of Engineering, 1881. 10-3/8" x 7-1/8". 16 pp. + two fold-out plates. Pale blue-green wrappers. Moderate wear and toning to edges, with a few chips to wrappers; spine perished and splitting at ends.
A scarce offprint, with 20 figures in the text and two fold-out plates outlining the Eureka Mill in Plumas County.
OCLC notes six holdings, two of which are at Harvard; not currently in commerce.