SUPPLEMENT. 421 



Jahresber. d. Chemie (1884), 1551, use of photographed spectra in quan- 

 titative analysis, by \V. N. Hartley. 



" " (1884), 1620, spectroscopic valuation of various 



kinds of indigo, by C. H. Wolff. 



" " (1884), 1848, effects of electric light, of sunlight, 



and of the light of particular parts of the spec- 

 trum on colors printed on cotton, by J. Depierre 

 and J. Clouet. 



" " (1885), 317, apparatus, by H. Kruss and by Ch. 



V. Zenger and De Thierry. 



u " (1885), 316, burning point of the ultra-red rays, 



by E. Lommel. 

 " " (1885), 317, temperature of the induction spark, 



by E. Demaryay. 

 '• " (1885), 317, sulphide of carbon prisms not suited 



to spectroraetric observations, by H. Draper. 

 " (1885), 317, 318, quantitative spectrum analysis, 



by L. Bell, applied to a solution of lithium. 

 (1885), 318, the iron lines, by R. Thalen. 

 " " (1885), 318, spectrum of samarium, by Lecoq de 



Boisbaudran. 



" " (1885), 318, spectrum lines which invert them- 



selves, by A. Cornu. 



" (1885), 319, influence of a strong magnetic field on 



the spectrum lines, by Ch. Fievez. 



" " (1885), 319, telluric band in the spectrum of steam, 



by H. Deslandres. 



" " (1885), 319, spectrum lines of hydrogen, by J. J. 



Balmer. 



" " (1885), 320, the secondary spectrum of hydrogen, 



by B. Hasselberg. 

 (1885), 320, spectrum of hydrogen, by H. Lagarde. 



•' " (1885), 321, band spectrum of nitrogen, by H. 



Deslandres. 



" " (1885), 321, spectrum of ammonia, by Lecoq de 



Boisbaudran. 



" " (1885), 322, absorption vessel for a poor absorbent 



solution, by A. E. Bostwick. 



" " (1885), 322, spectroscopic observations of blue crys- 



tals of rock-salt, by C. Ochsenius. 



