82 INDEX TO THE LITERATURE OF THORIUM. 



1898 : 659. Notk. A Welsbach Electric Light. 

 J. Gas L., 1898, 71, 397. 



1898 : 660. Editorial. The Welsbach Electric Light. 



J. Gas L., 1898, 71, 879; Ztschr. Elect., 1898, 16, 379; Rep. tech. 

 jour. -lit., 1898, 20, 54. 



1898:661. Salomons. The Welsbach Electric Light. 



Het Gas, Rotterdam, 1898; J. GasL., 1898, 71, 1064. 



1898:662. Note. Neueselektrisches Gliihlicht von Auer. Leuchtfaden 



aus Osiuium, resp. Osmium mit einem ueberzuge aus Thoroxyd. 



Uhland's W. T., 1898, 2, 42 ; Der Metallarbeiter, 1898, 24, 1, 363-365 ; 



Ztschr. Beleucht., 1898, 4, 127-128; Wieck's Deutsche Gewerbezei- 



tung, Stuttgart, 1898, 63, 204; Wagner's Jsb., 1899, 30, 100; Rep. 



tech. jour.-lit., 1898, 20, 54. 



1898: 663. Note. Gasgliihlicht-Processe. 

 J. Gasbel., 1898, 41, 562-565, 578-582. 



1898: 664. Note. Gasgliihlicht-Processe. 

 J. Gasbel., 1898, 41, 798-800, 816-818. 



1898: 6()5. Note. AtomgewichtederElementefiirpraktisch-analytische 

 Rechnungen. 



Chem. Ztg., 1898, 22, 1031. 



1898 : 666. Hintz. Method for analysis of incandescent mantles. 



The Mineral Industry, New Yoi'k, 1898, 7, 520-521 ; Progressive Age, 

 1899, 17, 419. 



1898: 667. Naumann. WelcheGrundlageistfiirdieatomgewichtszahlen 

 zu wiihlen, 0=16 oder H = 1 ? 



Cliem. Ztg., 1898, 22, 347-349; Jahrbuch Ciiem., 1898, 8, 66. 



1898:668. Bunte. (Light emissive power of the rare oxides.) 



Societe Franyaise de Physique, Bulletin, 1898, 114, p. 2; Electrical 



World and Engineer, N. Y., 1899, 33, 515 ; Science Abstracts, 1899, 

 2, 94. 



1899: 669. Bunti-:. The Rare Oxides and Incandescent Lamp. (A 

 note by the editor.) 



Electrical World and Engineer, N. Y., 1899, 33, 495-496. 



1899:670. . Electrolytic lamp and filaments. Patent to Wels- 

 bach. May 19, 1899. 



Electrical World and Engineer, N. Y., 1899,33,829; Chem. Ztg. Rep., 

 1899, 23, 240. 



1899:671. . A New Edison Lamp. Patent June 6, 1899. 



Electrical World and Engineer, N. Y., 1899, 33, 848; Chem. Ztg. Rep., 

 1899, 23, 240. 



