Technology of cellulose ethers. By E. C. Worden, M.A., D.Sc. Vol. J. Histohical development of the cellulose ethers. Pp. cxiii + 306. Vol. II. Historical development of the cellulose esters. Pp. cxiii + 307–1100. Vol. Hi. Cellulose ethers, haw materials anh manufacture. Pp. cxiii + 1101–1769. Vol. IV. cellulose ether solvents and commercial applications. Pp. cxiii + 1770–2661. Vol. A. Indices of patents, names, and subjects. Pp. 2G65–3396. New York: Chemical Catalog Co. $15.00. Sole Selling Agents in the U.K.: E. & F. N. Spoil, Ltd., London, 1033. £13 10s