Hale] 



578 



[Hale 



prominences and their spectra. Amer. Jl. Sci., 42, 1891, 



160-166. 

 Note on solar prominence photography. Astr. Nachr. , 



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

 On resultsobtained in photographing solar prominences 



and their spectra. Astr. Nachr., 128, 1891, 109-110; 



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. Rep., 1891, 557-558 ; Amer. Jl. Sci., 42, 1891, 



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

 Besearcb.es on the magnesia fluting in connection 



with the spectra of the nebulae. 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 spectroheliograph of the Kenwood Astro-physical 



Observatory, Chicago, and results obtained in the study 



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

 Eecent 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. 



Photographs of solar phenomena obtained with the 



spectroheliograph 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, lGd-168. 



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



July, 1892, as compared with the record of terrestrial 

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



Recherches sur 1'atmosphere 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 1'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 spectroheliograph. Astr. & Astrophys., 12, 1893, 



241-257. 

 Spectroscopic notes from the Kenwood Observatory. 



[The solar prominences and faculas 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 ph^nomenes 

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

 240-243. 



- Photographie de la couronne solaire, en dehors des 

 ellipses 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 1'^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 photographische Erforschung der Sonne. 

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



- Sur les facules solaires. Paris, Ac. Sci. C. 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 D 3 line in the spectrum of 

 the chromosphere. 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 D 3 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 MOHLER'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. fn. The building and minor 

 instruments. in. 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 spectroheliograph suggested by 

 Mr. H. E. NEWALL. Astrophys. 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 type. 

 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. 



