Objectives. 



165 



2040 



Krziz, A. Das persisch - arabische 

 AstrDlahiuni iles Abdul .Vinieh. "Weltall, 

 Berlin, 5, I'JO.J, (121 i;}0, I44-15-2). 



Nolan, Tboniasi. The telescope. Optical 

 principles iuvolved in the construction of 

 retractin<r and retlecting telescopes, with 

 a new chapter on the evolution of the 

 modern telescope and a biblioffraphy to 

 date. 2nd ed., rev. and enl. New York 

 (Van Xostrand), 1904, (128, with diagi's.). 

 15 cm. 



Payne, W[illiam] AV[aUace]. Large 

 refracting telescope for Amherst College 

 Observatorv. Pop. Astr., Northfield, 

 Minn., 11,' 1903, (22-24). 



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

 Supporting and counterweighting of the 

 principal axes of large telescopes. San 

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

 1904, (97-99). 



Pickering, Edward C[harles]. Com- 

 mon's 60-iuch telescope. Cauibridsje, 

 :\rass.. Harvard Coll. Obs. Cir., Xo. 83, 

 [1904], ([2]). 29.8cm. Pop. Astr., 

 Xorthtield, Minn., 12, 1904, (660-6G2). 



Schaer, Emile. Un refracto-retlecteur 

 de 34 cm. Paris, Bui. Soc. astr. France, 

 1903, (4.54-455). 



2040 objectives: glass axd 

 manufacture of glass, 

 co:mparisox of reflec- 

 tors AXD REFRACTORS. 



Optical Matters, Images, Dia- 

 phragms, Screens. Visual 

 Refractors. Photographic 

 Refractors. Photographic 

 Doublets. Mirrors. 



Xow glass for lenses. Pop. Astr., Xorth- 

 field, :\Iinn., 12, 1904, (425-426). 



Brenner, lico. Die Leistungen eines 

 Drei/.iillcrs. Lussinpiccolo, Astr. Rdsch., 

 7, 1905, (2(34-268). 



Conrady, A. E. The optical Sine- 

 condition. London, Mon. X'ot. R. Astr. 

 Soc, 65, 1905, (501-509). 



On the spherical correction 



of object-glasses. Loudon, Mon. X"ot. R. 

 Astr.'Soc, 66, 1905, (594-608). 



Cowper-Coles, Sh.Tanl. KliktiDlvti-. lus 

 Verlalu-cu zur lld-tilluiii;- ]);iralinliM'hcr 

 Spiegel. ins Dcutsrlir ul.citr. v. Kniil 

 Abel. (Monourapliien iiber aniicwandto 

 Elektrochemie. Hd. 14.) Halle a. S. 

 (W. Knapp), 1904, (v+ 17). 24 cm. 1 M. 



Faalhaber, C. Etwas iiber die Herstel- 

 luuL-- grosser Teleskop-Linsen. Prometheus, 

 iJ.rlin, 15, 1904, (529-533, 545-548). 



Fauth, Ph[ihpp]. Priifung eines 10" 

 Rellektors. [^^ergleichung von ReHektoren 

 und Refraktoren.] Mitt. Ver. Astr. , Berlin, 

 14, 1904, (71-73). 



Ein kurzbrennweitiger Re- 



Hektor. Mitt. Ver. Astr., Berlin, 14, 1904, 

 (109-110). 



Greenwich Royal Observatory. Dis- 

 tortion in photographic images with the 

 13 -inch astrographic object-glass of the 

 Royal Observatorv, Green\vich. London, 

 Mon. Xot. R. Astr. Soc, 65, 1905, (663- 

 665). 



Halting, n[ans]. Ziu- Theorie der 

 zweiteiligen astronomischen Femrohr- 

 objektive. Zs. Instrumentenk., Berlin, 

 24, 1904, (79-81). 



Hill, George A[ndrews]. A method of 

 obtaining the local point of a lens of long 

 focus. Pop Astr., Xorthlield, Minn., 11, 

 1903, (379-381). 



Lehmann, Hans. Grosser Quar/spektro- 

 graph. Zs. Instrumentenk. , Berlin, 24, 

 1904, (230-236). 



Lowell, Percival. Double canals and 

 the separative powers of glasses. Pop. 

 Astr., Xorthlield, Minn., 12, 1904, ([575]- 

 579, with text fig.). 



Moore, J. H. The loss of light by 

 absorption and reflection in the ;36-inch 

 ol)jective. San Francisco, Cal., Pub. 

 Astr. Soc Pac, 16, 1904, (202-203); 

 lierkelev, Lick Obs., Univ. Cal. Bull., 

 No. 63, [1904], (46) ; Astroph. J., 

 Chicago, lU., 20, 1904, (292-294). 



Payne, W[illiam] W[allace]. ^ The 

 " canals " of Mars. Pop. Astr., Xorth- 

 lield, Minn., 12, 1904, ([36.5]-375, with 

 text tig.). 



Ritchey, (J. W. On methods of testing 

 optical miirors durinif constructiou. 

 Astroph. J., Chicago, 111., 19, 1904, 

 (53-69, with text fig.). 



Schaeberle, J[ohn] :\I[artin]. On the 

 pilot. i-niphie etticiency of a 13 inch 

 retlecior of 20-inclu's "focus. Astr. J., 

 Boston, Mass., 23. 1903, (109 113, 

 with pi.). 



Strehl, Karl, ini liann der geometri- 

 .-(•hen Optik. Central/tu' Opt., Berlin, 25. 

 1901, (85 86). 



Widerspruch von Beugungs- 



tlieorie und geometrischer Optik in wirk- 

 lichen Fidlen von Fernrohr- uud Mikroskop- 



