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Trowbridge, C. C. Phosphorescent substances at liquid-air tempera- 

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Trowbridge , J., and C. C. Hiitckins. Oxygen in the Sun. Amer. J. 

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Acad. 23 (1887) 10-13; Amer. J. Sci. (3)34 (1887) 345-348; 

 Beibl. (1888) 356. 



and W. C. Sabine. Selective absorption of the metals for Ul- 

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443- 

 , . Wave-length of metallic spectra in the ultra-violet. 



Phil. Mag. (5) 26 (1888) 342-353; Beibl. (1889) 382; Chem. 



News 58 (1888) 237, 247, — See W. N. Hartley, ibid. 304. 

 , —■ — . On the Use of Steam in Spectrum Analysis. Phil. Mag. 



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(1889) 114-116. 



Change of Period of Electricity in Iron- Waves. Amer. J. 



Sci. (3) 48 (1894) 307-311. 

 . Carbon and Oxygen in the Sun. Amer. J. Sci. (4) i (1896) 



329-333; Phil- Mag. (6) 14 (1896) 450-454- 

 and T. W. Richards. Spectra of Argon. Amer. J. Sci. (4) 



3 (1897) 15-21; Phil. Mag. (5) 43 (1897) 77-83. 

 — , . The Multiple Spectra of Gases. Phil. Mag. (6) 43 (1897) 



135-139; Amer. J. Sci. (4) 3 (1897) 117-120. 



and J. E. Burbank. Phosphorescence produced by electrifi- 



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(1898) 55-57. 

 Tscherning. Les sept images de I'oeil humain. Seances de la Soc. 



frang. de phys. (1892) 288-296. 

 Tschirch, A. Der Quarzspectrograph und einige damit vorgenommene 



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 . Untersuchungen reiner Blattfarbstoffe mit deni Quarz- 



spektrographen. Photogr. Mittheil. (1896) Heft 24, 3 pp.; 



Beibl. (1897) 130. 

 Tucker, R. H. Charts of Faint Stars for Magnitude Comparison. 



Pub. Astron. Soc. Pac. 8 (1896) 95-98. 



