Hale] 



578 



[Hale 



prominences and their spectra. Atner. JI. Sci., 42, 1891, 



160-16fi. 

 Note on solar prominence photography. Astr. Nachr. , 



126, 1891, 81-82; 127, 1891, 211-214. 

 Onresultsobtained in photographinK solar prominences 



and their spectra. Astr. Nachr., 128. 1891, 10>.)-110; 



Spettrosc. Ital. Mem., 20, 1892, 140-141. 

 The Kenwood Physical Observatory. Astr. Soc. 



Pacific Publ.. 3, 1891^ 30-34; Sidereal Messenger, 10, 



1891, 321-323. 



The ultra violet spectrum of the solar prominences. 



Brit. Ass. Eep., 1891, 557-558 ; Amer. .11. Sci., 42, 1891, 



459-467; Astr. & Astrophys., 11, 1892, 50-59. 

 Researches on the magnesia fluting in connection 



with the spectra of the nebulse. Sidereal Messenger, 



10, 1891, 23-30. 

 Pending problems in spectroscopy. Sidereal Messenger, 



10, 1891, 89-94. 



Photography and the invisible solar prominences. 



Sidereal Messenger, 10, 1891, 257-264. 

 The spectroheliogra|ih of the Kenwood Astro-physical 



Observatory, Chicago, and results obtained in the study 



of the Sun. Amer. Ass. Proc, 1892, 55-56. 

 Recent results in solar prominence photography. 



Astr. & Astrophys., 11, 1892, 70-78. 



Note on recent solar investigations. Astr. & 



Astrophys., 11, 1892, 159. 



Spectroscopic observations of the great sun-spot 



group of February, 1892. Astr. & Astrophys., 11, 



1892, 310-314. 



Solar photography at the Kenwood Astro-physical 



Observatory. Astr. & Astrophys., 11, 1892, 407-417. 



The ultra-violet spectrum of the solar prominences. 



Astr. & Astrophys., 11, 1892, 602, 618, 821-822; 

 Spettrosc. Ital. Mem., 20, 1892, 154-160; 21, 1893, 

 160-161. 



Photography of solar phenomena obtained with the 



speetroheliograph of the Kenwood Astrophysical Ob- 

 servatory. Astr. & Astrophys., 11, 1892, 603-604. 



Photographs of the occultation of Mars by the moon 



(July 11, 1892), made at the Kenwood Astrophysical 

 Observatory. Astr. & Astrophys., 11, 1892, 610-611. 



A remarkable solar disturbance. Astr. * Astrophys., 



11, 1892, 611-613; Spettrosc. Ital. Mem., 21, 1893, 106- 

 107. 



Magnetic disturbances and auroras. Astr. & Astrophys., 



11, 1892, 617. 



The Yerkes Observatory of the University of Chicago. 



Astr. & Astrophys., 11, 1892, 790-793. 



Some results and conclusions derived from a photo- 

 graphic study of the Sun. Astr. & Astrophys., 11, 1892, 

 811-815; Spettrosc. Ital. Mem., 21, 1893, 165-168. 



On the condition of the Sun's surface in June and 



July, 1892, as compared n-ith the record of terrestrial 

 magnetism. Astr. & Astrophys., 11. 1892, 917-925. 



Eecherehes sur I'atmosph^re solaire. Paris, Ac. Sci. 



C. R., 114, 1892, 1406-1407; Spettrosc. Ital. Mem., 21, 



1893, 77-78. 



Photographies de la chromosphere, des protuberances 



et des facules solaires, a I'Observatoire d'astronomie 



physique de Kenwood-Chicago. Paris, Ac. Sci. C. R., 



115, 1892, 106-109; Spettrosc. Ital. Mem., 21, 1893, 



108-109. 

 On the probability of chance coincidence of solar and 



terrestrial phenomena. Astr. & Astrophys., 12, 1893, 



167-169. 

 The speetroheliograph. Astr. & Astrophys., 12, 1893, 



241-257. 

 Spectroscopic notes from the Kenwood Observatory. 



[The solar prominences and faculffi of April 16, 1893.] 



Astr. & Astrophys., 12, 1893, 450-455. 

 Spectrum of Comet b 1893. Astr. & Astrophys., 12, 



1893, 653. 



Les raies H et K dans le spectre des facules solaires. 



Paris, Ac. Sci. C R., 116, 1893, 170-172. 

 La probability de coincidence entre les phenomfenes 



terrestrea et solaires. Paris, Ac. Sci. C. R., 116, 1893, 



240-243. 

 Photographic de la couronne solaire, en dehors des 



eclipses totales. Paris, Ac. Sci. C. R., 116, 1893, 623- 



625; Astr. * Astrophys., 12, 1893, 260-262; Spettrosc. 



Ital. Mem., 22, 1894, 66-67. 

 M^thode spectro-photographique pour I'^tude de la 



couronne solaire. Paris, Ac. Sci. C. R., 116, 1893, 865- 



866. 



Solar photography at the Kenwood Astro-physical 



Observatory. Spettrosc. Ital. Mem., 21, 1893, 68-74. 



. The spectroscopic investigations of Mr. George Higgs. 



Astr. & Astrophys., 13, 1894, 151-153. 

 ~ On some attempts to photograph the solar corona 



without an eclipse. Astr. & Astrophys., 13, 1894, 662- 



687. 

 Ueber die photographisohe Erforschung der Sonne. 



Berlin Phys. Ges. Verb., 1894, 1-3. 



Sur les facules solaires. Paris, Ac. Sci. G. R., 118, 



1894, 1175-1177; Astr. & Astrophys., 13, 1894, 113-122; 

 Spettrosc. Ital. Mem., 22, 1894, 198-204; 23, 1895, 110- 

 111. 



Preliminary note on the Z>3 line in the spectrum of 



the cliromosp'here. Astr. Nachr., 138, 1895, 227-230; 

 Spettrosc. Ital. Mem., 24, 1895, 117-119. 



On a new method of mapping the solar corona without 



an eclipse. Astrophys. Jl., 1, 1895, 318-334. 



A large eruptive prominence. Astrophys. JL, 1, 1895, 



433-434. 



On a photographic method of determining the visi- 

 bility of interference fringes in spectroscopic measure- 

 ments. Astrophys. Jl., 1, 1895, 435-438. 



Note on the exposure required in photographing the 



solar corona without an eclipse. Astrophys. Jl., 1, 1895, 

 438-439. 



Note on the Dj line in the spectrum of the chromo- 

 sphere. Astrophys. Jl., 2, 1895, 165-166. 



The Yerkes Observatory. Astr. Nachr., 140, 1896, 



305-306. 



Note on the application of Messrs. Jewell, Humphreys 



and Mohleh's results to certain problems of astrophysics. 

 Astrophys. Jl., 3, 1896, 156-161. 



Yerkes Observatory, University of Chicago. Bulletin 



No. 1. [Bulletin No.' 2.] Astrophys. Jl., 3, 1896, 215- 

 219; 6, 1897, 147-153. 



The effect of a total eclipse of the Sun on the 



visibility of the solar prominences. Astrophys. Jl., 3, 



1896, 374-387. 



On the comparative value of refracting and reflecting 



telescopes for astrophysical investigations. Astrophys. 

 Jl., 5, 1897, 119-131. 



The Yerkes Observatory of the University of Chicago. 



I. Selection of the site. [n. The building and minor 

 instruments. iii. The instrument and optical shops, 

 and the power house. iv. The forty-inch telescope, 

 dome and rising-floor.] Astrophys. Jl., 5, 1897, 164-180, 

 254-267, 310-317; 6, 1897, 37-47. 



Note on a form of speetroheliograph suggested by 



Mr. H. E. Newall. Astrophy.'^. Jl., 5, 1897, 211-213. 



The aim of the Yerkes Observatory. Astrophys. Jl., 



6, 1897, 310-321. 



Note on the level of sun-spots. Astrophys. Jl., 6, 



1897, 366-368. 



On the presence of carbon in the chromosphere. 



Astrophys. Jl., 6, 1897, 412-414. 

 On the spectra of stars of Secchi's fourth tvpe. 



Astrophys. Jl., 8, 1898, 237-240; 9, 1899, 271-272; 



Science, 8, 1898, 455-456. 

 The function of large telescopes. Science, 7, 1898, 



650-662. 



