1 'rccei 



PHOTOGRAPH OF THE r, ARGUS NEBULA. 



Talien by Dr. CtILL, at the Eoyal Observatory, Cape of Good Hope, witli the .\stroPhoto-tek>seope of 13 inelies aperture used for tlie 



luternatioual Survey of the Heavens. Enlargement, 61 in. ■— 1". Exposure. 12 liours 12 minutes on four days, Mareli 26th to Mareh 3Uth. 



1892. The squares are produced by the Eetienle used for the International Survey photographs. 



