PART I. AUTHOR-INDEX. 1 27 



Pfliiger, A. Priifung der Cauchy'schen Formeln der Metallrefiexion 

 an den optischen Konstanten des festen Cyanins. Ann. Phys. n. 

 F. 65 (1898) 214-224. 



Piccini, A. II sistema periodico di Mendelejeff e i nuovi componenti 

 deir aria. Gazz. chim. Ital. 28 II (1898) 169-181. 



Pickering, E. C. The Henry Draper Memorial. First Annual Report 

 of the Photographic Study of Stellar Spectra conducted at 

 Harvard College Observatory, Cambridge. J. Wilson & Son, 

 1887, 10 pp. (Reports every year since then.) Beibl. (1887) 

 637; Rept. Brit. Assoc. (1887) 622. 



. Sterne mit besonderen Spectren. Astron. Nachr. 122 



(1889) 159-160; Beibl. (1890) iioo. 



. Spectrum von Plejone. Astron. Nachr. 123 (1889) 95- 



96. 



and 0. C. Wendell. Discussion of observations made with 



the Meridian-Photometer during the years 1 882-1 888. Annals 

 of Harv. Observ. 23 (1890) 136 pp., 4to, Cambridge, U. S. A., 

 1890. 



, . Results of observations with the Meridian-Photometer. 



Ann. Harvard Coll. Observ. 24 (1890) 268 pp., 4to ; Beibl. 

 (1891) 354. 



. Spectrum of t, Ursae Majoris. Amer. J. Sci. (3) 39 



(1890) 40-47; Beibl. (1890) 515. 



, The Draper Catalogue of Stellar Spectra. Ann. Harvard 



Observ. 27 (1890) 388 pp.; Beibl. (1891) 646. 

 . Vertheilung der Energie in Sternspectren. Astron. 



Nachr. 128 (1891) 377-380; Beibl. (1894) 97. 

 . The constitution of stars. Astron. and Astrophj^s. 12 



(1893) 718-722; Beibl. (1894) 673. 



Researches on the Zodiacal Light and on a photographic 



determination of the atmospheric absorption. Harv. Coll. 



Observ. Annals 19 II (1893) 165-331. 

 . The new star in Norma. Astron. and Astrophys. 13 



(1894) 40-41, 398; Beibl. (1894) 768. 

 . Photographic determination of stellar motions. Astron. 



and Astrophys. 13 (1894) 521-524. 

 . Discovery of variable stars from their photographic 



spectra. Astrophys. J. i (1895) 27-28, plate. 

 . Comparison of the photometric magnitudes of the stars. 



Astrophys. J. (1895) 154-159- 

 . T. Andromedae. Astrophys. J. (1895) 3°5""3o8. 



