Ruth erf urd's Photographic Plates. 



35 Persei. 



1877 



Perseus, 



1 1865 



J 1868. 



(clusters). 





1870. 





1873. 





1874 



Pleiades. 



1865. 





1866. 



1867. 



1868. 





1872. 





1874 



Prsesepe. 



1865 





1866. 





1867. 





1870. 





1877. 



41 Serpentis. 



1870. 





1872. 



Ursse Majoris. 



1872. 





1873. 



— Ursae Majoris. 



1872 



B. A. C. 4010. 





1830, Groom- 



' 1873 



bridge. 



1874 



82 Ursse Majoris. "I 1876. 

 B. A. C. 4564. i 1877. 



Feb. 6 (four). 



Feb. 18. 



Nov. 4, 12 (two), 13 (two), 23. 



March 24 (three), 25 (two). 



Dec. 2, 18. 



Jan. 18 (three) ; Oct. 14 (three), 15 ; Nov. 6 (two). 



Nov. 15 (five), 16 (three). 



Jan. 1, measured Jan. 1867 ; Jan. 31 (two) ; 



Feb. 21 (two), measured 1866; Feb. 21 (three), 



26 (three) ; March 6 (three), measured Jan. 



1867 ; March 10 (three), measured July, 1866. 

 Jan. 23 (two) ; 23, 27, measured 1867 ; Jan. 27 ; 



Feb. 7 (three), measured 1867. 

 Oct. 30 (three) ; Nov. 3, 5, 12, measured 1869 ; 



Nov. 12, 13 (two), 14 (two), 15 (two), 23. 

 Jan. 9 (two), 26. \ Measured 



Nov. 7 (two), 12, 26 (two). 



1875. 



Feb. 21 (two), 27. 



March 10 (two). 



Jan. 27; Feb. 3, measured 1867; Feb. 7 (two) 



April 3 (two), 18. 

 April 24 (two), 25 (two). 

 April 14, 25 (three) ; May 2 (three). 



July 30 (two), 31. 

 Aug. 27, 30 (two). 



May 27, 31 ; June 13. 

 May 18 (two), 26 (two). 



Jan. 5 (two) ; May 27; June 11, 



16 (two). 

 June 8 (two), 9 (two), 12 (two). 

 Jan. 14 (two) ; Feb. 16 (three) ; 



June 12, 13 (three), 14 (two). J 



May 26, 27 ; August 11 (two), 12 (two). 

 March 5 (two), 7 (three). 



Measured 

 1874. 



Vulpeculse. 

 B. A. C. 6654. 



1 1872. Nov. 13 (two), 17. 



— Vulpeculje. j 1870. August 18 (two), 19 (two). 

 B. A. C. 6657. i 1872. Oct. 31. 



— Vulpeculse. 

 B. A. C. 6762. 



20 Vulpeculse. 

 B. A. C. 6944. 



1874. Nov. 12 (two), 16 (three). 



1874. Nov. 12 (three). 



