6o LITERATURE OF THE SPECTROSCOPE. 



Hagenbach, A. Ein Versuch die beiden Bestandtheile des Cleveit- 

 gases durch Diffusion zu trennen. Ann. Phys. n. F. 60 (1896) 



124-133- 

 Hagcnhach, E. Balmer'sche Formel fiir die Wasserstofflinie. Beibl. 



(1887) 339; Verb. d. Naturforscb. Ges. Basel (1886) i. 

 Hale, G. E. Photograpby of tbe Solar Protuberances. Technolog. 



Quar. 3 (1891) 310-316; Beibl. (1891) 516. 

 . Remarkable disturbance on the Sun. Astron. and As- 



trophys. (1892) 3; Beibl. (1893) 126. 

 . The ultra-violet spectrum of the solar prominences. 



Amer. J. Sci. (3) 42 (1891) 459-467; Beibl. (1893) 126. 

 . Recherches sur I'atmosphere solaire. C.-R. 114(1892) 



1406-1407. 

 . Solar Photography at the Kenwood Observatory. As- 

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(1893) 126, 752. 

 . Some results and conclusions derived from a photo- 



graphic study of the Sun. Astron. and Astrophys. (1892) 



811-815; Beibl. (1893) 753. 

 . Les raies H et K dans les spectres des facules solaires. 



C.-R. 116 (1893) 170-173. 

 . Methode spectrophotographique pour I'etude de la cou- 



ronne solaire. C.-R. 116 (1893) 865-866; Beibl. (1893) 931. 

 . The Solar Faculae. Astron. and Astrophys. 13 (1894) 



113-122. 

 . The Spectroheliograph. Astron. and Astrophys. 12 



(1893) 241-257. 

 . Some attempts to photograph the Solar Corona without 



an eclipse. Astron. and Astrophys. 13 (1894) 662-688. 

 . Spectro-Bolographic Investigations at the Smithsonian 



Astrophysical Observatory. Astrophys. J. i (1895) 162-166. — 



See S. P. Langley, Recent Researches in the Infra-Red Spectrum, 



Rept. Brit. Assoc. (1894). 

 . New method of mapping the solar corona without an 



eclipse. Astrophys. J. i (1895) 318-334; Beibl. (1896) 32. 

 . A large eruptive prominence. Astrophys. J. i (1895) 



433-434- 



A photographic method of determining the visibility of 



interference fringes in spectroscopic measurements. Astrophys. 

 J. I (1895) 435-438- — See A. A. Michelson, Visibility Curve, 

 Phil. Mag., April 1891; Smithsonian Contrib. 842. 



