134 



MR. F. McCLEAN ON THE COMPARATIVE PHOTOGRAPHIC 



PHOTOGRAPHIC Stellar Spectra. Stars to Magnitude '6 '5. 



Upper Galactic Polar Region, N. 



A (Plates 1 to 3). 



NOTE. For LOCKTER'S Notation, see ' Phil. Trans.,' A, 1893. 



For PICKERING'S Notation, see 'Introduction to DRAPER Catalogue,' 1890. 

 For VOGEL'S Notation, see ' Potsdam Observatory Publications,' No. 11, 1883. 

 For SECCHI'S Types, see ' Mem. Soc. Italiana,' 18G7. For present order of Types 2 and 3, 

 see Preliminary Notice in ' Catalogo delle Stelle,' Paris, 1867, 



