74 LITERATURE OF THE SPECTROSCOPE. 



Humphreys, W. J. (Coufd). A further study of the effect of pres- 

 sure on the wave-lengths of lines in the arc-spectra of certain ele- 

 ments. Astrophys. J. 4 (1896) 242-262. 



. Changes in the wave-frequencies of the lines of emis- 

 sion spectra of elements, their dependence upon the elements 

 themselves and the physical conditions under which they are 

 produced. Astrophys. J. 6 (1897) 169-232; Beibl. (1898) 219; 

 Rept. Brit. Assoc. (1897) 556~557- 



. Absorption of Rontgen radiation. Phil. Mag. (5) 44 



(1897) 401-404. 



Humpidge, T. S. The Spectra of Erbia. Chem. News 53 (1886) 154. 

 — See Hartley, Chem. News 53 (1886) 179; and Lettsom, J. 

 Chem. Soc. 41 (1882) 210. 



Hupe, A. Bolometrische Arbeiten. Die Rotationsdispersion ultra- 

 rother Strahlen im Quarz. Wiss. Beil. Progr. Realschule, Char- 

 lottenburg, Ostern 1894, 46 pp. 



Hnriou, A. Diffraction par un ecrain circulaire. J. de phys. (2) 

 9 (1890) 55-57- 



. Transmission de la lumiere a travers les milieux troubles. 



C.-R. 112 (1891) 1431-4; Beibl. (1891) 647. 



. Sur les franges visibles dans une oculaire nadiral. J. de 



phys. (3) I (1892) 414-424; Beibl. (1893) 341. 



Hurmuzesctt, D. La nature du metal dans 1' absorption et remission 

 des rayons X. Eclairage electr. 15(1898) 166-168. 



Husmaii, A. Ueber das Doppler'sche Princip. Ztsch. phys. u. 

 chem. Unterr. 5 (1896) 237-238. 



Hussel, A. Eine neue Methode zur Messung der Drehung, welche 

 ultrarother Strahlen von bestimmter Strahlen von bestimmter 

 Wellenlange im Quarze erleiden. Diss. Miinchen 1891, 13 pp. 



Hussey, W. J. Physical characteristics of Comet Rordame. Pub. 

 A. Soc. Pac. 7 (1895) 185-191. 



. The Companion of Sirius and its brightness according 



to photometric theory. Pub. A. Soc. Pac. 8 (1896) 183-186. 



. Nova Z, Centauri and the Nebula surrounding it. Pub. 



A. Soc. Pac. 8 (1896) 220-222. 



. Projection on the Terminator of Mars. Astron. J. 16 



(1896) 208; Astron. Nachr. 141 (1896) 403. 



Hutchins, C. C. A new photospectroscope. Amer. J. Sci. (3) 33 

 (1887) 58-59; Beibl. (1888) 46. 



and E. S. Holden. Existence of certain elements, to- 

 gether with the discovery of Platinum in the Sun. Phil. Mag. 

 (5) 24 (1887) 325-330; Amer. J. Sci. (3) 34 (1887) 451-456- 



