trolytic Reductionof Phthalic Acid,”

1928); 1,768,523 (June 24, 1930);. 1,828,356 (Oct. 20, 1931); 2,043,-. 923 (June 9, 1936). (5) Flory, P. J., ... Page 1255, column 3, the sixth line f...
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( 5 ) Flory, P. J., C h m . Revs. 39, 137-97 / l O AS ”X \ ,. \A,

Alleman, G., Jolly, S. E. (to Sun Oil Co.), U. S. Patent 2,288,769 (July 7, 1942). Bawn, C. E. H., J . Oil t 3 Colour Chemists’ Assoc. 36, 443 (1953). Burk, R. E. (to Standard Oil Co. of Ohio), U. S. Patent 2,237,301 (April 8, 1941). Burwell. A. W. (to Alox Chemical Gorp.’), Zbid., 1,690,768 (Nov. 6, 1928); 1,768,523(June 24, 1930); 1,828,356 (Oct. 20, 1931); 2,043,923 (June 9, 1936).

(6) Kienle, R. H., others, J . Am. Chem. SOC. 61, 2258-68 (1939). (7) Polly, 0. L., others (to Union Oil Co. of California), U. S. Patent 2,606,890 (Aug. 12, 1952). (8) Waters, W. A,, “Organic Chemistry,” (Henry Gilman, editor), vol. IV, p. 1120, Wiley, New York, 1953. (9) Zellner, C. N. (to Tide Water Associated Oil Co.), U. S. Patent 2,342,028 (Feb. 15, 1944).

(10) Zbid., 2,486,454; 2,486,455; 2,486,-

456 (Nov. 1, 1949). Zbid., 2,581,506 (Jan. 8, 1952). Zellner, C. N., Lister, F. (to Tide Water Associated Oil Co.), Zbid., 2,581,507,2,581,508(Jan. 8, 1952). Ibid., 2,668,173 (Feb. 2, 1954). Zuidema, H. H., Chem. Revs. 38, 197227 (1946).

RECEIVED for review November 1. 1955 ACCEPTED May 25’, 1956 Division of Gas and Fuels and Division of Petroleum Chemistry, 128th Meetinc, ACS, Minneapolis, Minn.’, -September 193.5

Corrections

In the article entitled “Thermal Degradation of Unvulcanized and Vulcanized Rubber in a Vacuum” by Sidney Straus and S. L. Madorsky [IND.ENG. CHEW 48, 1212 (1956)] the figures should refer to samples as follows: Figures 4 and 3, Vulcanized rubber sample 3 ; Figures 6 and 7, Vulcanized iubber sample 4 ; Figures 8 and 9, Vulcanized rubber sample 5; Figures 10 and 11, Vulcanized rubber sample 6; Figures 12 and 13, Vulcanized rubber sample 9.

T h e following changes apply to “Electrolytic Reduction of Phthalic Acid,” Paul C. Condit, IND.ENG. CHEM.48, 1252-7 (1956). Page 1254, Figure 5 should be reversed (see correct position a t left). Page 1255, column 3, the sixth line from the bottom of column should read: Figure 7 shows a side view of the cell assembly with the threaded cup.

1948

INDUSTRIAL AND ENGINEERING CHEMISTRY