44 BIBLIOGRAPHY OF ASTRONOMY: 18S7. 



Photography (Astronomical) — Continued. 



Roberts (I.) Photographic search for the minor planet Sappho. Month, not., 



47: 265. 

 Spitaler (R.) Jlondphotographie. Sirius, 20: T-j, 101. 

 Taylor (J. T.) Photographic lenses. Eng. mec, 44: 495,517. 

 Vai.entiner (W.) Entwicklung der Photographie in ihrer Anwendung aiif 



die Astronomie. 16 p. 8vo. [n. p., 1887.] 

 Young (C. A.) Astronomical photography. New Princeton rev., 3 : 354-369. 



Also, abstr.: Obsry., 10: 239. Also, abstr. : Nature, 36: 113. 



Photography (Stellar). See, also, Parallax (Stellar); Spectra (Stellar). 



Backhouse (T. W.) Examination of stellar photographs [with a stereoscope]. 

 Obsry., 10: 196. 



Barn'Ard (E. E.) Recent stellar photography. Sid. mess., 6 : 59-65. 



CRI^<WIC'K (G. S.) [Photographs of star groups taken at Greenwich for deter- 

 mining distortion of the plate.] Abstr.: Obsry., 10: 407. 



Dreyer (J. L. E.) Effect of refraction in stellar photography. Month, not., 

 47: 421. 



Espin (T. E.) Stellar photography: the Liverpool astronomical society's re- 

 search . . . Eng. mec, 44: 475. 



Gbubb (H.) Choice of instruments for stellar photography. Month, not., 47: 

 309-322. Also, abstr. : Nature, 36 : 523. 



Knobel (E. B.) Examination of stellar photographs [with a stereoscope], 

 Obsry., 10: 231. 



MoucHEZ (E.) Preparatifs d'execution de la carte du ciel. Compt. Rend., 105 : 

 631. 



Roberts (I.) Measurement of celestial photographs. Month, not., 48 : 31. 



Rogers (W. A.) Determination of the coefficients of expansion of the glass 

 plates used for stellar photography at Cordoba in the years 1872 to 1876, and 

 1880 to 1883. Astron. jour., 7 : 123. 



ScHEiNER (J.) Einfluss verschiedener Expositionszeiten auf die Exaktheit pho- 

 tographischer Sternaufnahmen. Astron. Nachr., 118 : 153-156. 



Wolf (M.) Astrophotographischos Okular. il. Astron. Nachr., 118: 79. 



Photometers. 



CoRNU (A.) Sur quelques dispositifs permettant de realiser sans polariser la 

 lumiere des photometres birefringents. Bull, astron., 4: 89-94. 



VON GoTHARD (E.) Keilphotometcr mit Typendruck-Apparat. il. Ztschr. f. 

 Instrmknd., 7 : 347-349. 



Langley (S. P.), Young (C. A.) & Pickering (E. C.) Pritchard's wedge- 

 photometer. Mem. Am. acad. arts & sc, 11 : 301-324 (v. 11, pt. 5, no. 6). 

 Also, Reprint. 



Spitta (E. J.) Pritchard's photometer. Obsry., 10: 389. 



Photometry. 



Ceraski (W.) Photometrische Helligkeiten von 58 Sternen. Astron. Nachr.^ 

 116: 363. 



