171 



2040 



Wilson, W[illiam] E. Daramona 

 Obsei-vatoiy. Report for 1900. London, 

 Men. Not. R. Astr. Soc, 61, I'JOl, (234- 

 235). 



Daramona Observatory. 



Report for 1901. London, Men. Not. 

 R. Astr. Soc, 62, 1902, (280). 



2020 



OBSERVATORY 

 BUILDINGS. 



Saal, [Eduard]. Das Kuppelgebiiude 

 fiir den grossen Refractor des astro- 

 physikalischen Observatoriums auf 

 dem Telegraphenberge bei Potsdam. 

 Zs. Bauw., Berlin, 51, 1901, (359-380, 

 mit Taf.). [Aiich eiuzeln erscliienen.] 



2030 INSTRUMENTS (GENERAL). 

 Old Instruments, Astrolabes, etc. 



Die Riesengloben von Petersburg. 

 WeltaU, Berlin, 1, 1901, (22.3-221). 



Archenhold, F. S. Ueber die Ver- 

 fertiger der Pekinger Instrumeute. Wel- 

 taU, Berlin, 2, 1902, (93-95). [0010]. 



Hampe, Th. Vorlagen zu Sonnen- 

 uhren von Georg Brent el von 

 Lauingen. Niirnberg, Mitt. germ.Mus., 

 1901, (3-9). 



Hamy, Maurice. Sur I'emploi du 

 stereoscope en Astronomie. Paris, 

 C.-R. Acad, sci., 132, 1901, (1467- 

 1470). 



Hoppe, Paul. Ueber grosse astrono- 

 mische Fernrohre, insbesondere liber 

 das grosse Fernrotr der Treptower 

 Stern warte. Ann. Gew., Berlin, 49, 

 1901, (114-121, 1.30-136, mit 2 Taf.). 



Oudemans, J[ean] A[braliam] 



C[liretien]. [Constiiictiou sur iin cadran 

 solaire horizontal d'une courbe telle que 

 I'ombre du style s'y meuve uniforme- 

 mentj. Haarlem, Arch. Neerl. Sci. Soc. 

 HolL, (Ser. 2), 6, 1901, (404-411). 

 [A 8470]. 



Weitbrecht. Zur Frage der Kreis- 

 theilung. Zs. Landmesserver., Cassel, 

 21,1901,(5-11). [B0120 J 87]. 



WUson, H[erbert] C[ouper]. The 

 instriunents of Tycho Brake at the 

 Prague Observatory. Po]). Astr. North- 

 field, Minn., 9, 1901, (113-116). 



2040 OBJECTIVES: GLASS AND 

 MANUFACTURE OF GLASS, 

 COMPARISON OF REFLEC- 

 TORS x\ND REFRACTORS. 



Optical Matters, Images, Dia- 

 phragms, Screens. 

 Visual Refractors. 

 Photographic Refractors. 

 Photographic Doublets. 

 Mirrors. 



Anthony, Charles (Jun.). New form 

 of reflecting telescope. London, Mod. 

 Not. R. Astr. Soc, 61, 1901, (616-618) ; 

 (Abstract) Engl. Mech., London, 74, 1901, 

 (292). 



Hall, Asaph. Note on Clairaut's 

 " Theorie de la figure de la terre." 

 [Construction of a fluid parabolic mirror 

 of great size.] Pop. Astr., Northfield, 

 Mimi.,9, 1901, (60-61). 



Lummer, Otto, Modern lens-making, a 

 review of contributions to photogra- 

 phic optics. Nature, London, 63, 1901, 

 (227-229). 



Ritchey, G. W. The Two-foot re- 

 flecting telescope of the Yerkes 

 Observatory. Chicago, 111., Astroph. 

 J. Univ. Ciiic, 14, 1901, (217-233, with 

 pL). [2050]. 



Schaer, Emile. Un nouveau type de 

 lunette couxte. Astr. Nachr., Kiel, 

 154, 1901, (363-364). 



Schmidt, H. Die Herstellung von 

 Silberspiegelu. Phot. Mitt., Berlin, 38, 

 (109-111, 117-120). 



Sissingh, R[emmelt]. Sur quelques 

 proprietes des systeraes lentilles phqto- 

 graphiques. Haarlem, Arch. Neerl. 

 Sci. Soc HolL, (Ser. 2), 6, 1901, (390- 

 403). [C 3060]. 



Sowter, R.J. On astigmatic lenses. 

 Pliil. Mag., London, (Ser. 6), 2, 1901, 

 (239-216;). 



Strehl, K. Theorie des zweiliusigen 

 Objectivs. Zs. Instrumentenk., Berlin, 

 21. 1901, (10-11). 



Ueber die Bildscluirfo der 



Fernrohre. Astr. Nachr., Kiel, 158, 

 1902, (89-90). [C 3650]. 



Tydeman, Edmund M. New Method 

 of 'l'p>tinL;' Glass Surfaces. Sci. Amer. 

 Sup., New York, N.Y., 51, 1901. (20910). 



