Rutherfurd's Photographic Plates. 



CATALOGUE OF RUTHERFURD'S NEGATIVES DEPOSITED AT 

 COLUMBIA COLLEGE OBSERVATORY, SEW YORK CITY. 



Sun, negatives. 



1860. April 27; May 4, 23 (two 1 ), 25, 29 (two) ; June 6, 8 (two), 23, 



26 ; July 17 ; Sept. 7 ; Oct. 24 ; Nov. 20. 



1861. Feb. 19, 27 ; March 4; April 20 (two), 21, 22 (two), 24 (two), 



25, 27, 29 ; May 2, 14, 30 ; June 1 ; July 29 ; Sept. 26. 



1862. June 21. 

 1866. Feb. 3 (two). 



1870. Feb. 16 (two), 17 (two), 23; March 3 (two), 11, 14, 15, 16, 17, 



19, 20, 21, 24, 25, 26 (two), 29, 31 ; April 6 (two), 7, 8, 12, 

 13, 15, 16, 20, 26, 30; May 3, 13, 15, 16, 19, 21, 26 ; June 4, 

 18; July 29; August 6, 17, 20, 27 (two), 29; Sept. 1, 19, 

 20 (three), 23 (two), 24, 26, 28; Oct. 5, 8, 14. 



1871. April 17, 18, 21 ; June 16 ; July 10, 16, 21, 22, 26 ; August 11, 



12, 18 (two), 19. 



1872. Jan. 2; Feb. 5; May 7, 10, 17; June 15, 27; July 6, 17; 



August 10, 12 ; Sept. 21 ; Nov. 27. 

 1874. April 5 ; May 7, 10, 15, 19, 27 ; June 1, 30 ; July 11 ; Sept. 28 ; 

 Nov. 27; Dec. 9 (two). 

 Remarks. — 139 negatives in the above list. Each negative has the time of 

 exposure marked on the plate. 



Sun, positives, and enlargements of sun spots. 

 9 in number. August and Sept. 1871. 



Sun in Eclipse. 



1860. July 18. 10 negatives. 



1865. Oct. 19. 9 negatives. 



1869. Aug. 7. 8 negatives. 



Solar Spectrum. 



160 negatives, of which 10 are sealed for special protection. 

 14 positives. 



The Moon, negatives. 



1858. June; Nov. 2; Dec. 16, 20, 22, 24 (two). 



1859. Jan. 17 (two); Feb. 10, 13, 14, 16 (two), 18; March 9 (two), 



10 (three), 12 (two), 13 (two), 15, 16 (three), 18 (two) ; 

 April 16 (four), 18 (two) ; Dec. 8. 



1 This indicates the number of plates taken on May 23. 



