2400 150 



2400 rnOTOilETKY, CiENERAL. 

 Visual. 



Photographic. 

 Spectrophotometiy. 



Buscaglioni, Liiigi. Oculare fotome- 

 trico per la misiira delle inteiisita lumi- 

 nose degli astri. Catania, ilem. Soc. 

 spettroscop. ital., 32, 1903, (3-8, con 

 1 tav.). 



Fabry, Charles. Sur rinteusite de 

 reclaireinent produit par le Soleil. 

 Paris, C.-R. Acad, sci., 137, 1903, 

 (973-975). 



Sur rinteusite lumineuse 



des etoiles et leur comparaison avec le 

 Soleil. Paris, C.-R. Acad, sci., 137, 

 1903,(1242-1244). 



Parkhurst, J. A. Nova Geminonim. 

 An early photograph and photometric 

 magnitudes. Astroph. J., Chicago, 111., 

 17,1903, (373-375, with pl.j. 



Wolf, Llax. Ueber Helligkeitsschat- 

 zvmgen auf photograohischen Flatten. 

 Astr. Nachr., Kiel, 165, 1904, (201-204). 



Practical Astronomy. 



2500 



RADIOMETRY (BOLO- 

 METRY). 



Abbot, C. G. The new ccelostat and 

 horizontal telescope of the astrophysical 

 observatory of the Smithsonian institu- 

 tion. Washington, D.C., Smithsonian 

 Inst., Misc. Collect. Q. Issue, 45, 1903, 

 (84-90, with pi.). Separate. 24.5 cm. 



Langley, Samuel Pierpont. Report of 

 the Secretary of the Smithsonian Insti- 

 tution of all appropriations heretofore 

 expended by the Aatrophysical Observa- 

 tory, residts reached, and present con- 

 dition of the work, in response to Senate 

 resolution of February 25, 1901. [Pub- 

 lished as Senate Document No. 20, 57th 

 Congi'ess, 1st Session.] "Washington, 

 D C, 1902, (xxxiii -f 306, with pi.). 

 29.5 cm. [Includes reprint of Annals 

 of the Smithsonian Astrophysical Ob- 

 servatory, Vol. 1.] 



2600 



MISCELLANEOUS. 



A nearly total eclipse of the moon 

 observed by means of photoelectric 

 selenimn cells, by A. G. Sci. Amer. 

 New York, N.Y., 89, 1903, (242). [4860]. 



Curtis, Heber D. On the limits of 

 unaided vision. Berkeley, Lick Obs., 

 Univ. Cal., Bull., No. 38, [1901], (67- 

 69) ; Science, New York, N.Y., (N. Ser.), 

 17, 1903, (1010-1011). 



Glazenap, S. P. Sur la determination 

 du temps a I'aide du triangle solaire. 

 (Russ.) Russ. astr. Kalendari, N.- 

 Novgorod, 1904 [1903], (31-41). 



Kostersitz, Karl. Die Photographic 

 im Dienste der Himmelskunde. AVien, 

 MouBL Wiss. Klub, 23 (1901-1902), 

 1902, (.3-5). 



Langley, S[amuel] P[ierpont]. " Good 

 seeing." Washington, D.C., Smith- 

 sonian Inst., Rep., 1902, 1903, (1 I. + 

 193-195, with pi.) Separate. 24.5 cm.; 

 Amer. J. Sci., New Haven, Conn., (Ser. 

 4), 15, 1903, (89-91, with 1 pL). 



Le Maire, A. La determination de 

 I'heure au moyen d'un gnomon a suspen- 

 sion. Braselies, Bui. Soc. astron., 1901, 

 (318-322). 



Scharbe, S. B. Encore sur le stereo- 

 scope dans I'Astronomie. (Russ.) Russ. 

 astr. Kalendari, N.-Novgorod, 1904 

 [1903], (29-30, av. pi.) 



Verde, F. La distanza zenitale di un 

 astro misurato a bordo mediante tre 

 fotografie dell'astro. Riv. scientif. 

 industr., Firenze, 20, 1903, (118-123). 



GENERAL REDUCTION AND 

 RECTIFICATIOKl OF OBSERVA- 

 TIONS. 



3000 ADJUSTMENT OF INSTRU- 

 MENTS. 

 Draper, Henry. On the construction 

 of a silvered glass telescope fifteen and 

 a half inches in aperture, and its use in 

 celestial photography. [Reprinted from 

 Washington, D.C, Smithsonian Inst. 

 Cont. KnowL, 14, 1804.] Washington, 

 D.C, Smithsonian Inst. Cont. Know!., 

 34, No. 1459, 1904, (2 L -f [iv] -|- 55, 

 with text fig.). 



3010 EQUATORIALS, INCLUD- 

 ING CLOCK RATE AND RE- 

 FRACTION. 

 Ball, L^eo] de. Ueber neue Refrac- 

 tionstafeln. Circular der [Moriz] v[on] 

 Kuffner'scheu Sterwarte. Wien, 1904, 

 (4). 30 cm. 



