NORTH 



oUowing 



Pi-ect 



PHOTOGRAPH OF THE rj ARGUS NEBULA. 



Taken by Mr. H. C. Russell, with the Astro-Photo-telescope of 13 inclies aperture used for tlie International Surrey of the Heavens. 



Enlargement 6| in. = 1''. Exposure, 8 hours. 



Scale of this 



IH.r(ct Plwio Eiiyr'tviii'j Comimny, 0, Bnrnshury Fai-k. 



