NATURAL SCIENCES OF PHILADELPHIA. 53 



24. 32 Eridani, 5 : 7. Bright yellow and flushed blue. Webb. 



Orange yellow and pale blue. Mitchell, 18G1, Jan. 31. 

 Yellow and pale green, very decided. Mitchell, 1862, Dec. 28. 

 Yellow and green. Mitchell, 1863, Jan. 1. 



25. Gamma Virginis, 4 : 4. Silvery white and pale yellow. Webb. 



Both yellow. Mitchell, 1860, Feb. 20. 



26. 35 Piscium, 6 : 8. White and purplish. Webb. 



The 6 is light yellow. The 8 is peculiar ; there is a brown mingling 

 with its reddish light. Mitchell, 1860, Jan. 2. 



27. 23 Orionis, 5 : 7. Greenish white and white. Struve. 



Creamy white and blue. Webb. 



The 7 is of a darkish color. Mitchell, 1860, Mar. 6. 



28. 39 Ophiuchi, 53- : 73. Pale orange and blue. 1838. 



The 73- yellow!" Sestini, 1846. 

 " bluish. Smyth, 1851. 

 " clear blue. Webb, 1854. 



29. Polaris, Alpha Ursas Minoris, 2| : 93- Yellow and dull white. .Struve. 



Yellow and blue. Sestini, Dawes, Webb. 



30. Iota Cancri, 5} : 8. The 8 deep garnet, Feb. 8, 1782; bluish Dec. 28, 



1782 ; and blue, Mar. 12, 1785. Herschel, Sr. 

 Pale orange and clear blue. Webb. 



31. Sigma Scorpii, 4 : 93. The 9} white. St6tini. 



Dusky and plum color. Webb. 



32. Delta Corvi, 3 : 8J. The 8 white. Sestini. 



Pale yellow and purple. Webb. 



33. Pi Bootis, 33 : 6. Both white; a ruddy tinge sometimes in 6. Webb. 



34. Alpha Herculis, 3j : 5J: "Intense csernlea." Struve. 



Orange and emerald. Webb. 



35. Delta Serpentis, 3 : 5. Yellow tints. Dembowski. 



Bright white and bluish white. Webb. 

 Both Bluish. Webb. 



36. Eta Cassiopeae, 4 : 7|. " Flava et purpurea." Struve, Fletcher. 



Red and green. Herschel, Jr., South. 

 Yellow and orange. Sestini. 

 Dull white and lilac. Webb. 



37. Iota Bootis, 4 : 8. The 8 azure. Sestini. 



The 8 lilac. Webb, 1850. 



Light yellow and dusky white. Webb, 1850. 



38. 39 Bootis, 5J : 6j. White and lilac. Some writers ascribe a bluish and 



some a ruddy tint to 6. Webb. 



39. Epsilon Lyre. The two companions of this double star are designated. 



Epsilon 1 and Epsilon 2. Each of these again are double. 



Epsilon 1, 5 : 6$. Yellow and ruddy. Webb. 



During five years the 5 was bluish. Struve, Dembowski, 



40. Gamma Cygni, 4 : 7. Both white. Herschel, Sr. 



Viridi-cserulea. Struve. 



The 7 light emerald. Smyth, 1839. 



Golden yellow and flushed grey. Webb, 1850. 



41. Beta Lyrae. A quadruple star; 3 : 8 : 83 : 9. 



1864.] 



