1891.] NEW YORK ACADEMY OF SCIENCES. 97 



Catalogue of 1,098 Standard Clock and Zodiacal Stars, prepared under 



the direction of Simon Newcomb. (Papers prepared for the use of 



the American Ephemeris, No. 4). 

 Photometric Measurements of the Variable Stars /J Persei and D. M. 



81/35. By Edward C. Pickering, Arthur Searle, and O. C. Wendell. 



(Proc. Amer. Acad., Vol. XVI.). 



I., 239. 



G. Schiapai-elli: Osservazioni astronomiche e fisiche suU' asse di rota- 



zione e sulla topografia del pianeta Marte (Atti della R. Acad, dei 



Lincei, Serie III.; Tiansunti, Vol. 5). 

 Observations sur i'aspect physique de Jupiter pendant I'opposition de 



1878. Par L. Niesten (Annales astron. de I'Obs. R. de Bruxelles, 



T. III.). 

 Astronomische Mittheilungen, von Dr. Rudolf Wolf, No. 53. 

 Reports of American Observatories (1879). 

 A Determination of the Solar Parallax from Observations of Mars made 



at the Island of Ascension in 1877. By David Gill, LL.D. (Fronx 



the Mem. R. Astron. Soc, Vol. 46.) 



II., 20. 



On the Relative Accuracy of Different Methods of Determining the 



Solar Parallax. By Wm. Harkness (Amer. Jour., November, 1881). 

 Observations of the Transit of Mercury, 1881, November 7. at Mount 



Hamilton, Cal. (Communicated by the Lick trustees.) By Edw. S. 



Holdenand S. W. Burnham (American Journal of Science, January, 



1883). 

 Zur Theorie des Encke'schen Cometen. Von O. Backlund (Mem. de 



I'Acad. Imp. de St. Petersbourg, 7me serie, T. 28, No. 6). 



II., 44. 



Account of Observations of the Transit of Venus, 1874, December 8» 

 made under the Authority of the British Government, and of the 

 Reduction of the Observations. Edited by Sir George Biddell Airy, 

 K.C.B. Printed for H. M. Stationery Office, 1881. 



II., 65. 



Conference Internationale du Passage de Venus. Procesverbaux, 

 Paris, 1881. 



Librorum in Bibliotheca Speculse Pulkovensis contentorum Catalogus 

 systematicus. Pars Secunda ab E Lindemanno elaborata. Eden- 

 dum curavit et pi-efatus est O. Struve. Petropoli, 1880. 



Sur I'enregistrement des battements de secondes d'une pendule du 

 moyen du microphone. Par M. W. Meyer, astronome-adjoint a I'ob- 

 servatoire de Geneve (Archives des Sci. Phys. et Natur., troisieme 

 periode, T. VI.). 



Thirty-sixth Annual Report of the Director of Harvard College Obser- 

 vatory. By E. C. Pickering. 



II., 97. 



Sur le compagnon de I'etoile y d'Andromede et sur un nouveau mode de 

 reglage d'un equatorial (Compt. Rend., T. XCIV.). 



