175 



3020 



Wirtz, Carl W. Photographisch- 

 photometrisclie Untersuchungen. Astr. 

 Nachr., Kiel, 154, 1901, (317-362). 

 [7080 7600 3350 F 0500]. 



2500 



RADIOMETRY 

 (BOLOMETRY). 



Langley, S[amuel] P[ierpont]. The 

 new spectrum. Washington, D.C., 

 Smithsonian Inst., Rep. 1900, 1901, 

 (683-692, with diagram). Published 

 as separate. 24 cm. [4530 5400 

 G 30.301. 



The 



spectrum. 



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



4), 11, 1901, (403-413, with 1 pi.). 

 [4530 5400 C3030]. 



Saunders, F. A. Note on a new 



form of radiometer. Chicago, 111., 

 Astroph. J. Univ., Chic, 14, 1901, (36- 

 37). [C 0200]. 



2600 



MISCELLANEOUS. 



Jacoby, Harold. Comparison of 

 methods for the reduction of star photo- 

 graphs. Astr. J., Boston, Mass, 22, 

 1901, (81-83). 



Elumpke, M^"*'- Progi-amme des 

 ascensions astrouomiques en 1901. 

 Aeronaute, Paris, 34, 1901, (58-62). 



Mill, Hugh Robert. On the adoption 

 of the metric system of units in all 

 scientific geographical work. Verb, 

 intern. GeogrCongr., 7, (1899), 2, Berlin, 

 1901, (120-124). [J 69 B 0110]. 



North, Barker. Star photography 

 with an ordinary camera. Engl. Mech., 

 London, 72, 1901, (461-464). 



Rey-Pailliade, J. de. Sur I'applica- 

 tion rationelle du systeme decimal aux 

 mesures du temps et des angles. Verb, 

 intern. GeogrCongr., 7, (1899), 2, 

 Berlin, 1901, (125-128). [J 69 



B 0110]. 



ScMesinger, Frank. On the relative 

 accuracy of certain methods for reduc- 

 ing stellar photographs. Astr. J., 

 Boston, Mass., 22, 1901, (67-68). 



Ttimer, H[erbert] H[all]. On a simiile 

 method of accurate surveying with an 

 ordinary camera. Loudon, Mon. Not. 

 R. Astr. Soc, 62, 1902, (126-132). 



Zoth, 0[scar]. Bemerkungen zu einer 

 alten ,,Erklarung" und zu zwei neuen 

 Arbeiteu, betreffend die scheinbare 

 Grosse der Gestirne und Form des Him- 

 melsgewolbes. Arch. ges. Physiol., 

 Bomi, 88, 1901, (201-224). fO 37.53 

 C 4440]. 



GENERAL REDUCTION 

 AND RECTIFICATION 

 OF OBSERVATIONS. 



3010 EQUATORIALS, 



INCLUDING CLOCK RATE 

 AND REFRACTION. 



Hinks, A[rthur] R[obert]. On the 

 possibility of systematic error in photo- 

 graphs of a moving object. London, 

 Rep. Brit. Ast, 1901, (540). 



Innes, R[obert] T. A. On the obser- 

 vation of position angles of polar 

 double stars. London, Mon. Not. R. 

 Astr. Soc, 61, 1901, (358-360). 



Laves, Kurt. On the adjustment of 

 the equatorial telescope. Second Part. 

 Pop. Astr., Northfield, Minn., 9, 1901, 

 (13-18). 



Peter, B[runo]. Ueber den Einfluss 

 der atmospharischen Dispersion auf die 

 Messung von Distanzen. Astr. Nachr., 

 Kiel, 155, 1901, (289-306). 



3020 TRANSIT CIRCLE. 



CoweU, P[hilip] H[erbert]. Tables to 

 facilitate the redaction of transits, ar- 

 ranged for use at the Ro3'al Observatory, 

 Greenwich. Greenwich Obsiis. 1899, 



1901, ([1]-[14]). 



Etzold, R. Zeitbestimmimg mittels 

 des Passage-Instrumentes. Leipzig ( W. 

 Diebener), 1901, (H -f 95). 23 cm. 

 2 M [9220]. 



Renton, James. Refraction within 

 telescope tube. Nature, London, 63, 

 1901, (3.34). 



Uhlicli, P. Lehrbucli der Markschei- 

 dekuiide. Freiberg i. S. (Craz & Gcr- 

 lach), 1901, (IX + 402). 24 cm. 14 M. 

 [J 70 H 99 B 0120 F 3000 G 18]. 



Updegrraflf, Milton. On the errors of 

 a transit instrument due to ellipticitv of 

 pivots. Astr. Naclir., Kiel, 155, 1901, 

 (241-246) 



