64 LITERATURE OF THE SPECTROSCOPE. 



Hartley, W. N. (Coiifd). The physical character of the hnes in the 

 spark spectra of the elements. Proc. Roy. Soc. 40 (1891) 448- 

 451; Beibl. (1891) 714; Astron. and Astrophys. (1892) 223-228. 



. Liquid prisms. Nature 44 (1891) 273 ; Beibl. (1891) 770. 



. Methods of observing the spectra of easily volatile metals 



and their salts, and of separating their spectra from those of the 

 alkaline earths. J. Chem. Soc. Dec. i, 1892; Chem. News 66 

 (1892)311-314; Beibl. (1893) 925. 



. Variations observed in the spectra of carbon electrodes, 



and on the influence of one substance upon the spectrum of an- 

 other. Proc. Roy. Soc. 54 (1892) 344-349; 55 (1895); Beibl. 



(1894) 1046. 



. Flame Spectra at High Temperatures. Part I.: Oxy- 



hydrogen Blowpipe Spectra; Part II.: The Spectrum of Metallic 

 Manganese, of Alloys of Manganese, and of Compounds contain- 

 ing that Element; Part III.: The Spectroscopic Phenomena and 

 Thermo-Chemistry of the Bessemer Process. Phil. Trans. 185 



(1895) 161-213, 1029-1041 ; 1041-1093 ; Proc. Roy. Soc. 52 (1892- 

 1893) 5-7; 56 (1894) 192--193. 193-199; Beibl. (1893) 1055. 



. Origin of Colour and Fluorescence. J. Chem. Soc. 6^ 



(1893) 243-256; Beibl. (1894) 341. 

 . New methods of spectrum analysis, and on Bessemer 



flame spectra. Rept. Brit. Assoc. (1894) 610-611; Beibl. (1896) 



26. 

 . The spark spectrum of Argon, as it appears in the spark 



spectrum of Air. Proc. Roy. Soc. 57 (1895) 293-296; Beibl. (1895) 



635- 



. Remarks on the origin of the lines and bands observed in 



the spectra of Swedish Bessemer works. Proc. Roy. Soc. 59 



(1896) 98-101; Beibl. (1896) 367. 



and H. Ramage. The occurrence of the element Gallium 



in the Clay-Ironstone of the Cleveland District of Yorkshire. 



Proc. Roy. Soc. 60 (1896) 35-37. 

 . On the spectrum of Cyanogen as produced and modified 



by spark discharges. Proc. Roy. Soc. 60 (1896) 216-221. 

 and H. Ramage. The spectrographic analysis of minerals 



and meteorites. Chem. News 76 (1897) 231; Beibl. (1898) 667, 



774- 



, . A determination of the wave-lengths of principal lines 



in the spectrum of Gallium, showing their identity with two lines 

 in the solar spectrum. Proc. Roy. Soc. 60 (1897) 35 and 393; 

 Astrophys. J. 9 (1899) 214-220. 



