LITERATURE OF THE SPECTROSCOPE. 221 



Note of an experiment on the spectrum of the electric discharge. 



Grove (Sir W. R.). Proc. Royal Soc, 28, 181-4; Beiblatter, 3, 360 

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Das Stokes'sche Gesetz. 



Hagenbach (E.). Ann. Phys. u. Chem., n. F. 8, 369. 



The investigation by means of photography of the ultra-violet spark 

 spectra emitted by metallic elements and their combinations 

 under varying conditions. 



Hartley (W. N.). Chem. News, 48, 195-G ; Nature, 29, 89-00 ; Jour. 

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Spectrum of lightning. 



Herschel (Lieut. John). Proc. Royal Soc., 16, 418; 17, Gl. 



Spectra of lightning. 



Hoh (Th.). Chem. News, 30, 253; Ann. Phys. u. Chem., 152, 173. 



Spectrum of lightning. . 



Holden (E. S.). Amer. Jour. Sci., (3) 4, 474-5. 



Spectrum of the electric light. 



Hopkins-Walters (J.). Nature, 25, 103. 



Electric spectra in various gases and with electrodes of various sub- 

 stances. 



Huggins (W.). Phil. Trans., 1864; Ann. Phys. u. Chem., 124, 275- 

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Photographische Wirkung electrischer Metallspectren. 



Jahresber. d. Chemie, (1862) 33, (1863) 104, 106, 107, 113, (1864) 109, 

 110, 115, (1865) 90, 91, 92, (1868) 126-7, (1872) 148, (1873) 150-2,' 

 (1875) 123. 



Spectrum des Blitzes. 



Jahresber. d. Chemie, (1864) 109, (1868) 126, 127, (1872) 148. 



Spectralanalyse mittelst des Inductionsstroms. 



Jahresber. d. Chemie, (1865) 91, 92, (1873) 150, 151-2, (1864) 110. 



Spectrum of lightning. 



Joule (J. P.). Nature, 6, 161. 



Spectra of two hundred and fourteen flashes of lightning observed at the 

 astrophysical observatory in Hereny, Hungary. 



Konkoly (N. von). Observatory (1883), 267-8; Beiblatter, 7, 862 

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