Hackh — Modification of the Periodic Table. 501 



r ' Phil. Mag., 26, p. 1024, 1913. 



10 Compt. rend., 159, p. 304, 1914. 



11 Phil. Mag., 28, p. 139, 1914. 



12 Phil. Mag., 28, p. 144, 1914. 



13 Ber., 35, p. 562, 1902. 



14 Ber., 46, p. 422, 1915; also Chem. Weekbl., 12, p. 336, 1915. 

 13 Naturwissenschaften, 2, p. 781, 1914. 



16 Z. Elektrochem., 14, p. 525, 1908. 



17 Z. Elektrochem., 7, p. 254, 1900; also Z. phys. Chem., 35, p. 291, 1900. 



18 Festschrift Nernst, p. 332, 1912. 



19 Handbueh der anorg. Chem., Ill, 2, p. 2, 1907. 



20 Chem. Kal., II, p. 333, 1915. 



21 Phys. Chem. Tabellen, p. 1208. 



22 J. Am. Chem. Soc, 35, p. 1440, 1913. 



23 Z. phys. Chem., 43, p. 372, 1893. 



24 Ber., 38, p. 914, 1905. 



24 a J. Am. Chem. Soc, 33, p. 648, 1911. 



25 J. Am. Chem. Soc, 38, p. 169, 1916. 



26 Weltwissen, 3, p. 63, 1915. 



27 Hackh, Das Synthetische System der Atome, Hamburg, 1915. 



28 J. Am. Chem. Soc, 38, p. 169, 1916. 



29 Chem. News, 54, p. 1, 1886. 



30 Ber., 19, p. 3092, 1886. 



31 Periodische Gesetz, Berlin, 1887. 



32 Chem. News, 78, p. 25, 1898; also Proc Boy. Soc, 63, p. 408, 1898, 

 and Z. anorg. Chem., 18, p. 72, 1898. 



33 Chem. News, 58, pp. 93 and 103, 1888. 



34 Phil. Mag., 4, p. 411, 1902; also Chem. News, 57, p. 163, 18S8: and 

 Proc. Boy. Soc, 46, p. 115, 1888. 



35 Lehrbuch der anorg. Chem., Beilage. 

 ^Pharm. J., 84, p. 159, 1910. 



37 Am. Chem. J., 45, p. 160, 1911. 



38 Proc. Boy. Soc, 85, p. 471, 1911. 

 89 Chem. Weekblad, 8, p. 389, 1911. 



40 Erklarung der chemischen Wertigkeit und periodischen Begelmassigkeit 

 des elements durch ein model, Hamburg, 1913. 



41 Weltwissen, 3, p. 63, 1915. 



42 Bev. geh. sci., 25, p. 734, c/o Chem. Abstr., 9, p. 540, 1915. 



43 Le Badium, 11, p. 6; also in Chemistry of the Badioactive Elements, 

 part 2, p. 11, 1915. 



44 Chem. Zentr., 2, p. 1, 1915. 



45 Chem. News, 111, p. 157, 1915. 



48 Orig. Com., 8th Int. Congr. Appl. Chem., 22, p. 187. 



