WEST. 



EAST. 



I.-PHOTOGRAPH OF THE NORTH POLE OF THE MOON WHEN 242 HOURS OLD. 



Taken In- MM. P.u'i. and Prosper Henry with tlieir IS-inch refractor, at the Paris Observator.v, on the 28th May, 1890. 



Enlarged 15 diameters from tlie image in the i)riuoipal focus. 



Direct Photn Engviivin^ Crtrnpnuy. 9, 7farn»bury Park, N. 



