7 E 



■1300 Corona and Chroiiiospheie. 



4320 Chromosphere. General. 



Radial Extent. 



Form of Prominences and Chang'es in ditto. 

 Spectrum {see below, 4700). 

 Periodic Chang-es. 

 Photographs, Urawing-g. 

 4340 Moon on Corona, Baily's Beads, &c. 



43r)0 Terrestrial Phenomena during- Eclipses. 



4SG0 Pliotogiaphs of Sun [i.e., references to published 



reproductions). 

 Drawing's of Sun (ditto ditto.) 



SpectroEcopy of Sun and Eclipses. 

 4500 Solar spectrum (integrated sunlight). General. 



4.^10 Ultra-violet spec-trum. 



Waveleng-Dhs, Maps, Photographs. 

 ■1.520 Visible spectrum. 



Visual, Photog-raphic (Wavelengths, Maps, 

 Photog-raphs). 

 4530 Ultra-red spectrum. 



Photographic, Bolometric (Wavelengths, 

 Maps, Photographs). 

 4540 Identification of lines with Elements. 



4550 Changes in appearance of lines (width, intensity). 



4560 Bright lines. 



4570 Distribution of energy in spectrum. 



4580 Telluric lines. 



4G00 Spectroscopic researches of surface without eclipse. 



4G10 Spots. 



4620 Faculge. 



4Go(,* Chromosphere without eclipse. 



4G4() Determination of rotation. 



4G50 Spectroscopic researches of Sun in eclipse. 



4660 Corona. 



47(i0 Chromosphere. 



4750 Physical constitution deduced from Spectroscopic 



Observations. 

 4800 Moon. General. 

 ^810 Observations for position. 



4820 Constants, Dimensions (diameter and figure), mas.s, 



density, distance. 

 4830 Rotation (Libration see aL<o 1730), Configuration of 



Surface, changes in ditto. 

 4840 Atmosphere. 



4850 Tenipeiatux'e, Radiation, Brightness, Phases. Lumiere 



Ceni'.re'e. 

 48G0 Eclipses. {See also 0350). 



4870 Occultation (stars, planets, separately). {See also 0350). 



4880 Influence on Terrestrial phenomena. {See also Tides 



and E 0480). 

 48'.>0 Photographs, Maps, Drav/ings (^published repro- 



ductions). 



