(10) Revue industrielle, 1890, p. 194. German Pat. 52977, March 7, 1889. (11) French Pat. 256854, June 2, 1896. (12) German Pat. 55949, Nov. 9, 1889. German Pat. 58508, Sept. 16, 1890. German Pat. 82555, Nov. 15, 1894. (13) German Pat. 58508, Sept. 16, 1900. (14) French Pat. 231230, June 30, 1893. (15) German Pat. 93009, Nov. 19, 1895. French Pat. 254703, March 12, 1896. English Pat. 6858, March 28, 1896. (16) American Pat. 573132, Dec. 15, 1896. (17) This proportion is the most advantageous, and furnishes the best liquid collodions that can be spun. (18) French Pat. 259422, Sept. 3, 1896. (19) English Pat. 22540, 1896. (20) Application for German Pat. not granted, 4933 IV. 296, Mar. 16, 1897. (21) German Pat. 96208, Feb. 10, 1897. Addit. Pat. 101844 and 102573, Dec. 10, 1897. (22) Oberle et Newbold, French Pat. 25828, July 22, 1896. Granquist, Engl. applic. 2379, Nov. 28, 1899. (23) German Pat. 72572, June 17, 1891. (24) Voy. Stern, Ber., 28, ch. 462. _Group II_ (1) German Pat. 98642, Dec. 1, 1897 (Pauly). French Pat. 286692, March 10, 1899, and addition of October 14, 1899 (Fremery and Urban). French Pat. 286726, March 11, 1899, and addition of December 4, 1899. German Pat. 111313, March 16, 1899 (Fremery and Urban). English Pat. 18884, Sept. 19, 1899 (Bronnert). English Pat. 13331, June 27, 1899 (Consort. mulhousien). (2) French Pat. 203741, Feb. 12, 1890. (3) The actual lapse of this patent is due to the death of Despeissis shortly after it was taken. (4) Without questioning the good faith of Pauly, it is nevertheless a fact that the original patent remains as a document, and therefore that the value of the Pauly patents is very questionable. (5) Girard, Ann. Chim. et Phys, 1881 (5), 24, p. 337-384. _Group III_ (1) Cross and Bevan, Cellulose, 1895, p. 8. (2) English Pat. 16805, Dec. 22, 1884. (3) English Pat. 17901, July 30, 1897. (4) Bronnert, American Pat. 646799, April 3, 1900. (5) Cross and Bevan, Cellulose, 1895, p. 12. _Group IV_ (1) English Pat. 8700, 1892. German Pat. 70999, Jan. 13, 1893. (2) English Pat. 4713, 1896. German Pat. 92590, Nov. 21, 1896. (3) Comptes rendus (loc. cit.). Berichte, c. 9, 65a. (4) English Pat. 1020, 1898. German Pat. 108511, Oct. 18, 1898. ~Artificial Silk--Lustra-cellulose.~ C. F. CROSS and E. J. BEVAN (J. Soc. Chem. Ind., 1896, 317). The object of this paper is mainly to correct current statements as to the artificial or 'cellulose silks' being explosive or highly inflammable (ibid., 1895, 720). A specimen of the 'Lehner' silk was found to retain only 0.19 p.ct. total nitrogen, showing that the denitration is sufficiently complete to dispose of any suggestion of high inflammability.