120 



Perrine, C[harles] D[illon]. Nova 

 Geminoriira. Saa Francisco, Cal., Pub. 

 Astr. Soc. Pac, 15, 1903, (164-165). 

 [7600]. 8073 



The photographic spectrum 



of comet c 1903 (Borrelly). San Francisco, 

 Cal., Pub. Astr. Soc. Pac, 15. 1903, 

 (203-204). [6600]. 8074 



Elements of comet c 1903 



(Borrelly). San Francisco, Cal., Pub. 

 Astr. Soc. Pac, 15, 1903, (204). [6600]. 



8"75 

 • Observations of the white 



spot on Saturn. San Francisco, Cal., 

 Pub. Astr. Soc. Pac, 15, 1903, (222). 

 [6140]. 8076 



The supporting and counter- 

 weighting of the principal axes of large 

 telescopes. San Francisco, Cal., Pub. 

 Astr. Soc. Pac, 16, 1904, (97-99). 

 [2030]. 8077 



Observations of Phoebe, the 



ninth satellite of Saturn. San Francisco, 

 Cal., Pub. Astr. Soc. Pac, 16, 1904, 

 (267). [6560J. 8078 



Ueber den YI. und YII. 



Jupitersraond. Astr. Nachr., Kiel, 168, 

 1905, (109-110). [6550]. . 8079 



Orbits of the sixth and 



seventh satellites of Jupiter. Astr. Nachr., 

 Kiel, 169, 1905, (43-44). [6550]. 8080 



Perrot, Louis. Observations de la 

 comete 1902 b. Bui. astr., Paris, 21, 

 1904, (72). [6600]. 8081 



Perry, John. Drehkreisel. Vorti-ag 

 .... Uebers.v. August Walzel. Leipzig 

 (B. G. Teubner), 1904, (viii+r25). 19 cm. 

 Geb. 2,80 M. [5000]. 8082 



Peters, G. H. Photographic observation 

 of the minor planet (60) Echo, obtained 

 with the 6-inch star-camera at the U.S. 

 Naval Observatory. Astr. J., Boston, 

 Mass., 23, 1903, (SuppL, after page 92) ; 

 [reprint], lb. (103). [-5900]. 8083 



Photographic observations of 



minor planets, obtained with the 6 -inch 

 star camera at the U.S. Naval Observatorv. 

 Astr. J., Boston, Mass., 23, 1903, (103). 

 [5910]. 8084 



• A photographic observation 



of a minor planet. [Mit Zusatz von 

 [Heinrich] Kr[eutz].] Astr. Nachr., Kiel, 

 167, 1905, (79-80). [5910]. 8085 



Philipot, Th. A phylosophical essay 

 treating of the most probable cause of that 

 grand "mystery of nature, the flux and 

 reflux : or, flowing and ebbing of the sea. 

 London, 1673. [Facsimile edition. Ed. 



W. Junk. No. 4.] BerHn (W. Junk), 



1904, (iv+14). 23 cm. 5 M. [1750]. 



8086 



Phillips, Theodore E. R. On a form 



of eiTor in eye-estimated transits of spots 



on Jupiter. ObservatoiT, London, 28, 



1905, (344-347). [6040]". 8087 



NouveUes observations de la 



planete Mars. Paris, Bui. Soc. astr. 

 France, 1904, (119-125). [5840]. 8088 



Pic art, Luc. Discussion des sui-faces de 



niveau dans le probleme restreint. Bui. 



astr., Paris, 20, 1903, (401-409). [12001. 



8089 



Notes sur quelques observa- 



toires. Bui. astr., Paris, 20, 1903, (457- 

 480). [2010]. 8090 



Pickering, Edward C[harles]. A photo- 

 graphic map of the entire sky. [Reprint. 

 V. E. 4, No. 6275.] Astroph. J., Chicago, 

 111., 18, 1903, (70-74). [7000]. 8091 



— Stars ha^'ing peculiar specti'a. 



[Reprint, v. E. 4, No. 6259.] Astroph. 

 J., Chicago, III., 19, 19 4, (287-289). 

 [7600 8300 8400]. 8092 



Variable stars in the nebula 



of Orion. [Reprint, r. E. 4, No. 6260.] 

 Astroph. J., Chicago, 111., 19, 1904, (289- 

 295). [7b00]. 8093 



A new Algol variable, — 



15° 4905. [Reprint] Astroph. J., Chi- 

 cago, 111., 20, 1904, (296-299). [7600 

 8550]. 8n94 



A new variable in Hercules. 



Astroph. J., Chicago, 111., 20, 1904, (358). 

 [7600]. 8095 



Obsen'ations of variable stars 



made with the meridian photometer during 

 the years 1892-1898. Cambridge, Mass., 

 Ann. Obs. Harvard Coll., 46, 1904, 

 (2 1. 4- [121]-249, with pi.). Separate. 

 29cm. [2400 7600]. 8096 



Variable stars of long period. 



Cambi-idge, Mass., Harvard Coll. Obs. 

 Cir., No. 74, [1904], (10). 29.8 cm. 

 [7600]. 8097 



Variability of Iris (7) . Cam- 

 bridge, Mass., Harvard Coll. Obs. Cir., 

 No. "75, [1901], ([3]). 29.8cm. Reprint. 

 Astroph. J., Chicago, 111., 19, 1904, (220- 

 223) ; Pop. Astr., Northfield, Minn., 12, 

 1904, (258-262). [5960]. 8098 



— Stars ha-ring peculiar spectra. 



Cambridge, Mass., Harvard Coll. Obs. 

 Cir., No. 76, [1904], ([2]). 29.8 cm. 

 [8400]. 8099 



First supplement to cata- 

 logue of variable stars. Cambridge, Mass., 



