74 



Graff, K[asimir], Stromgren, E[lis] und 

 Andersen, R. Beobachtungen des 

 Kometeii 1912a (Gale). Astr. Naclir. 

 Kiel 193 1913 (25-2S). [6600]. 21093 



uud Thiele, H. Beobacli- 



tnngen von Kometen, kleinen Planeten 

 imd Veranderlichen im Jahre 1910. Asti*. 

 Nachr. Kiel 191 1912 (301-314). [6600 

 5910 7600]. 21094 



Gratschew, M. A. v. Gratev, M. A. 



Gray, Edward. Initial difficulties in 

 variable star work. Pop. Astr. North- 

 field Minn. 20 1912 (87-90). [7600]. 



21095 



Astral disks and colored 



stars. Pop. Astr. Northfield Minn. 20 

 1912 (358). [2600]. 21096 



Greenwicli Royal Observatory. 



Greenwich Obns. 1910 1912 (16 + 

 Axxx+A 122+B xx+B S3-fC 127 + 

 Dvi+ D75 + 5 + Exsxix+E 92 + 7 + 7 

 + 29). 33 cm. [7020 7030 4030 

 4820 5620 5720 5820 6020 6120 

 6220 6320 4020 4810 5610 5710 

 5810 5910 6010 6110 6210 6310 

 6600 4870 C550 6560 4070 6650]. 



21097 



The effect of atmospheric 



dispersion on the Greenwich photographs 

 of Eros. London Mon. Not. R. Astr. 

 Soc. 72 1912 (420-422). [4050]. 21098 



Observations of Nova 



Geminorum No. 2. London Mon. Not. 

 R. Astr. Soc. 72 1912 (515-518 with pi.). 

 [7600 8300]. 21104 



Photographs of the partial 



solar eclipse of 1912 April 17. London 

 Mon. Not. R. Astr. Soc. 73 1913 (41-46). 

 [4210]. 21099 



Mean areas and helio- 



graphic latitudes of sun spots in the year 

 1911. London Mon. Not. R. Astr. Soc. 

 73 1913 (47-50). [4070]. 21100 



Results of micrometer 



measures of double stars made with the 

 28-inch refractorinthe year 191 1. London 

 Mon. Not. R. Astr. Soc. 73 1913 (93- 

 115). [7510]. 21101 



Observations of the 



satellite of Neptune, from photographs 

 taken between 1909 November 22, and 

 1910 April 15 London Mon. Not. R. 

 Astr. Soc. 73 1913 (155-158). [6580]. 



21102 



Observations of occulta- 



tions of stars by the moon, made in the 



year 1912. London Mon. Not. R. Astr. 

 Soc. 73 1913 (158). [4870]. 21103 



Gregory, Richard A. Cycles of the 

 sun and weather. Nature London 89 

 1912(147-149). [4110]. 21105 



Gromadzkl, Al. Zacmienie slonca 17 

 kwietnia 1912 r. [[^'eclipse de soleil du 

 17 avril 1912.] Sprawozdanie XVIII 

 zakladu naukowo-wychowawczego -00. 

 Jezuitow w Bgkowicach pod Chyrowem 

 za r. szk. 1911 Przemysl (NakL za- 

 kladu) 1911 (str. 58 + 57). 8vo. [4210]. 



21106 



Grossmann, E[rnst]. Relative Schwere- 

 Messungen in Bavern im Jahre 1907. 

 (3. Reihe. 1907!) Astr.-geod. Arb. 

 Miinchen H. 7 1 912 (31-59). [5100]. 



21107 



Report and recommenda- 

 tions of the Parallax Committee of the 

 Astronomische Gesellschaft. [Transla- 

 tion.] Pop. Astr. Northfield Minn. 19 

 1911 (430-433). [7070]. 21108 



Groth, Hugo. Physikalische Prinzi- 

 pien der Naturlehre und Isaak Newton's 

 mathematische Prinzipien. Kiel (Lip- 

 sius & Tischer) 1912 (IV + 158). 

 21 cm. 4M. [1050]. 21109 



Grover, C[harles]. (Rousdon) Obser- 

 vations of long-period variable stars 

 during the year 1912. London J. Brit. 

 Astr. Ass. 23 1913(195-198). [7600]. 



21110 



Grubb, Howard. Improvements in 

 equatorial telescope mountings. Dublin 

 Sci. Proc. R. Soc. 13 (N. Ser.) 1912 (223- 

 228 with pis.). Separate 28 cm. Is. 

 [2050]. 21111 



Guerrieri, Eugenio. Passaggio del 

 pianeta Mercuric sul disco del sole 

 osservato nel R. Osservatorio Astro- 

 nomico di Capodimonte il 14 novembre 

 1907. Napoli Atti Ace. sc. 1911 (1-9). 

 [5670]. 21112 



Statistica delle macchie 



solari isolate ed in gruppi e facole 

 osservate durante I'anno 1910 nel R. 

 Osservatorio di Capodimonte. Riv. 

 astr. sc. affini Torino 5 1911 (158-164 

 200-210). [4070]. 21113 



Cometa di Metcalf (1910b). 



Riv. fis. mat. sc. nat. Pavia 1911 23 (49- 

 60). [6600]. 21114 



Cometa di Faye (1910e). 



Riv. fis. mat. sc. nat. Pavia 1911 24 

 (119-125). [6600]. 21115 



