Practical Astronomy. 



14: 



2100 



Inst., Misc. Collect. Q. Is.<ur-, 45. 100-3, 

 (84-00, with pi.). Separate 24.5 cm. 



Gray, Arthua- W. Ein leicht herstell- 

 barer Heliostat. Zs. physik. Unterr., 

 Berlin, 17, 1904, (25-27). 



Gnibb, Sir Howard. Floating re- 

 fracting Telescope. Dublin, Sci. Proc. 

 R. Soc, (N. Ser.), 10, 1904, (133-137, 

 with pis.). 



Lindemann, A.F. Eine neue Aequa- 

 torealform. Astr. Nachr., Kiel, 164, 

 1904, (.389-392, mit 1 Taf.). 



Ritchey, G[eorge] W[illis]. Astro- 

 nomical photography with the fort^v-inch 

 refractor of the Yerkes Observatory. 

 Chicago, 111., Pub. Yerkes Obs. Univ. 

 Chic, 2, 1904, ([387J-397, with pi.); 

 Chicago, HI., Dec. Pub. L'niv. Chic, 

 (Ser. Ij, 8, 1903, ([387]-397, with pi.). 



Taylor, Alfred. " Photographic chart " 

 . . . (v. Franklin- Adams). Descrip- 

 tion of the mount. Loudon, Mon. Not. 

 R. Astr. Soc, 64, 1904, (624-626). 



Woods, H. S. The eleveu-and-oue- 

 lialf-iuch equatorial telescope. Topeka, 

 Trans. Kan. Acad. Sci., 18, 1903, (231- 

 233, with pi.). 



Grubb, Sir Howard. A new form of 

 dipleidoscope. Dublin, Sci. Proc. R. 

 Soc, (N. Ser.). 10, 1904, (141-142, 

 with pi.). 



Schwarzschild, K. Photographische 

 Ortsbestimmung [Zenithteleskop]. Jahrb. 

 Phot., Halle, 17, 1903, (207-217). 



Todd, David. Xote on Dr. Schwarz- 

 schild's photographic Zenith Camera. 

 Astr. Nachi-., Kiel, 165, 1904, (105-108). 



2080 EXTRA-MERIDIAX IXSTRC- 

 ilEXTS FOR ABSOLUTE 

 POSITIOX. 



Altazimuth. 

 Vertical Ciixle. 

 Almucantar. 

 Various. 



Conrady, A. E. Xote. on a suggested 

 method of detemiining the declination, 

 of stars. London, Mon. Xot. R. Astr. Soc, 

 64. 1904, (673-67.5). 



2070 MERIDIAX IXSTRUMEXTS 

 (MOUNTING AND DESCRIP- 

 TION). 



Transit Circle, Visual and Photo- 

 graphic. 



Zenith Telescope, Visual and 

 Photograpliic. 



Doolittle, Charles l.[eander]. Results 

 of observations with the zenith telescope 

 of the Flower astronomical obser^-atory, 

 from September 6, 1898, to August 30, 

 1901 . Philadelphia, Pub. Univ. Pa., Ser. 

 Astr., 2. pt. 1, 1903 (2 1. + 122, with 

 diagr. tab.). 31 cm. 



Franz, Julius. Ueber zwei neue 

 grosse Meridiau-Instrumente und iiber 

 I'in neues photograph is ehes Objectiv der 

 Breslauer Sternwarte. Breslau, Jahres- 

 ber. Ges. vaterl. Cultur. natw. Sect., 79, 

 (1901), 1902, (2-5). 



Grubb, Sir Howard. Registration of 

 star transits by photograjihy. Dublin, 

 Sci. Proc R. Soc, (N. Ser.), 10, 1904, 

 (138-140). 

 [E-9052) 



2100 AUXILIARY IXSTRUMEXTS. 



Clocks, Chronometers, Watches, 

 Ch! onographs, Levels. 



Greenwich, Royal Observatory. Rates 

 of Chronometers on trial for purchase by 

 the Board of Admiralty at the Royal 

 Observatoi-v, Greenwich, from 1901 

 -July 6 to" 1902 January 25. Green- 

 wich Obsus., 1901, 1903, (1-13). 



Rates of Deck Watches 



on trial for purchase by the Board of 

 Admiralty at the Royal Observatory, 

 Cireenwich, from 1901 October 20 to 

 1902 February 15. Greenwich Obsns., 

 1901, 1903, (1-7). 



Un cadransolaire russe. Rev. indust., 

 batiment, Bruxelles, 1902, No. 2. 



Britten, F. J. Old clocks and watches 

 and their makers. (2nd Ed.) London 

 (Batsford), 1904, (VIlH-735}. 23.5 cm. 



Capelle. Welche Schliisse lassen sich 

 aus den Augaben der Clironometer- 

 journale auf die navigatorische Tatigkeit 

 eines Schiiles ziehen? Ann. Hydrogr., 

 Berlin, 31, 1903, ;257-262). 



