[New York: P. G. Williams, 1902]. First edition. 8vo, original printed green wrappers, 40 pages. Extensively illustrated. Edges of the wrappers a bit sunned and browned; a very good copy. Item #18321
Medical dry cell batteries, electrodes, accessories, Rhumkorff Induction Coils for office X-ray work, the Williams X-ray outfit, etc. (The Williams concern boasts in part of the quality of cabinet makers employed for constructing the battery cases.).