ASTRONOMY FOR 1889, 1890. 179 



Photography (Astronotuical). 



Flammarion (C.) Les proj^r^s de la pbotograpbie celeste, il. L'Astrou., 8: 



121-4. 1890. 

 HoLDEN (P^. S.) Pbotograpbiug and seeing stars in tbe day-time. Astrou. Jour., 



9: 73-74. 

 Photography (Stellar). 



Anotheh photographic chart of the lieavens. Obsry., 12: 308-11. 



CiiAKLiEK (C. V. L.) Anwendniig dcr Stenipbotographie zu Helligkertsnics- 



euugen der Sterne. 8-j-31 j). 4to. Leipzig, 1889. 

 Pub. d. astron. Gesellsch., 19. 

 Gould (B. A.) Reduction of photographic observations, witb a deterniiuatlon 



of tbe position of the Pleiades from photograpbs by Mr. Rutberfurd. Meui. 



Nat'l Acad. Sc, 4: 173-90 (v. 4, 3. nieni.). Also, Reprint. 

 Kapteyn (J. C.) Bericht iiher die zur Herstellung eiuer Durcbuiusterung des 



siidlichen Himmels ausgefiibrteu Arbeiteu. Vrtljschr. d. astron. Gesellsch., 



24: 213-20. 

 La carte photograpbique du ciel. L'astron., 8: 388-91. 1889. 

 Pickering (E. C.) Photographic chart of tbe heavens. Obsry., 12: 375. 

 Reunion du couiit6 international i)eriuaueut pour l'ex6cution de la carte photo- 

 grapbique du ciel, a Fobservatoire de Paris en septeiiibre 1889. 112 p., 4to. 



Paris, 1889. 

 Photometry. 



ScnAEBERLE (J. M.) Photographic brightness of the fixed stars. Pub. astron. 



soc. Pacific, 1 : 53-64. 

 SCHEINER (J.) Bestinmiung der Sterngrossen aus photographischen Aufnah- 



nien. Astron. Nachr., 121 : 49-62. 

 Planets. 



Gregory (R. A.) Determination of masses in astronomy. Nature, 40: 80. 

 Hall (A.) Deduction of planetary masses from tbe motions of comets. Astron. 



Jour., 9: 47. 



Pleiades. 



Elkin (W. L.) Comparison of Dr. Gould's reductions of Mr. Rutherfurd's 



Pleiades photographs with the heliometer results. Astron. Jour., 9: 33-35. 

 Gould (B. A.) Determination of the position of the Pleiades from pbotograpbs 

 by Mr. Rutberfurd. Mem. nat'l acad. so., 4 : 173-90. (v. 4, 3. mem.) Also 

 Reprint. 



Praesepe. 



Gould (B. A.) Reduction of pbotograpbic observations of the P;esepe. Mem, 

 Nat. Acad. Sc, 4: 193-9. (v. 4,4. mem.) Also, Reprint. 

 Proper motion. 



Boss (L.) Proper motions of stars in tbe Albany zones. (-f-O^ 50' to 50° 10' for 

 1885.) Astron. Jour., 9: 57-64. 

 Red stars. 



Clerke (A. M.) Some southern red stars. Obsry., 12 : 134. 

 Refraction. 



LAsKA (W.) Ueber eine einfache Refractionsforiue]. Astron. Nacbr., 121 : 111. 

 Lehmann-Filhi^:s (R.) Eine geniiherte Refractiousforniel. Astron. Nachr., 



121: 383. 

 Radau (R.) Essai sir les refractions astronomifiues. 80 p. 4to. Paris, 18?9, 

 Resisting medium. 



Hall (A.) Resisting medium in space. Sid. Mess., 8: 433-42. 



